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A Mechanic's Life - Tales From Under the Hood

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Comments

  • andres3andres3 Member Posts: 13,934
    edited November 2016
    stever said:

    Well, I researched toaster ovens pretty hard and waited about 3 months to find my Panasonic on sale. Best advice on it came from Fat Wallet of all places. :D

    Hmm, what can I credit CR for, let's see:

    Every black dot on the Neon came true.

    Every black or white/empty dot on the Accord came true.

    I fared a bit better with the A3; though I did have some of the problems where the dot wasn't full red.

    I think they have great reviews on vacuums, the Kenmore really is a good one. They steered us towards Sony Trinitron TV's in the '80's and '90's and those TV's probably have a better "still working" ratio than Big 3 cars from the same time period! I know other people who seemed to buy a new cheap TV every 3 or 4 years, and spent more over the long run.

    I do find that they don't always review "top of the line" electronic/audio equipment correctly (if at all, they can only buy so many different brands/models). They are good with your every day stuff. So I'd agree enthusiasts will give you a better idea at the top of the market.

    However, the tire reviews seemed to be spot-on with my enthusiast experiences. They even separate Summer/Performance tires from regular tires so the rankings don't get mixed.

    My biggest problem with CNET is that they only seem to review brands that market on their website.
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • xwesxxwesx Member Posts: 17,688
    andres3 said:

    I think they have great reviews on vacuums, the Kenmore really is a good one. They steered us towards Sony Trinitron TV's in the '80's and '90's and those TV's probably have a better "still working" ratio than Big 3 cars from the same time period! I know other people who seemed to buy a new cheap TV every 3 or 4 years, and spent more over the long run.

    I do find that they don't always review "top of the line" electronic/audio equipment correctly (if at all, they can only buy so many different brands/models). They are good with your every day stuff. So I'd agree enthusiasts will give you a better idea at the top of the market.

    However, the tire reviews seemed to be spot-on with my enthusiast experiences. They even separate Summer/Performance tires from regular tires so the rankings don't get mixed.

    My biggest problem with CNET is that they only seem to review brands that market on their website.

    Agreed on the vacuum and Trinitron! I have both, and both are excellent. Our TV is still the 1997 32" Trinitron I bought upwards of twenty years ago....
    2018 Subaru Crosstrek, 2014 Audi Q7 TDI, 2013 Subaru Forester, 2013 Ford F250 Lariat D, 1976 Ford F250, 1969 Chevrolet C20, 1969 Ford Econoline 100
  • iluvmysephia1iluvmysephia1 Member Posts: 7,709
    I'll actually pick up a CR and look at it once in a while. I give them a 7 out of 10.

    2021 Kia Soul LX 6-speed stick

  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    Hmmm. We were just talking about this.
    I got a notification that Spencer left a review for my shop. He wrote;

    "The owner did not even try to help. He flat out hung up on me."

    I think this is someone who called about 12:30 today.
    He was describing that his car is making some kind of a noise and I offered to take a look at it tomorrow afternoon when I get to the shop. I heard him say that he works till 5pm and can't get there at that time and then nothing, call ended. That's right it was either look at it right then or it wasn't going to be good enough. So for answering the phone which is forwarded to me cell and offering a time that he could bring it in I get a one star review.

    I put a response to his one star review but in my heart I wonder really why bother? People that do things like he did aren't customers and I may well have dodged a bullet. But for what it is worth, here is the response.

    I'm sorry, but I don't have any idea what you are referring to. Are you the person that called today around 12:30? If so, as I was describing when it appeared that you hung up on me is that we are only open part time and the shop is not open today. Our conversation today abruptly ended right after I offered to see your car tomorrow afternoon around 2:30 and when I asked if that would work for you all I heard was you reply that you work through 5pm and the call suddenly dropped. Just so you know, most of the time I am out of the area teaching continuing educational classes for professional technicians. It's been that way since I had major spinal surgery about two years ago which had a significant impact on my ability to handle many of the more physical challenges of the job. Today I specialize in electronics and diagnostics and do more work for other shops and/or direct referrals from them than regular repair work. If you need advanced diagnostics, that is something that we offer and would be happy to assist when we are available.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Too much information but you had the right idea. I'd be glad to edit it for you :smile:
  • thecardoc3thecardoc3 Member Posts: 5,848
    No need, people like Spencer make me glad to be semi, and hopefully soon to be fully retired.
  • thecardoc3thecardoc3 Member Posts: 5,848
    So do you want to know the rest of the story? Since I have the shops calls forwarded to my cell phone, I had his number to call him back........
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Sure. Did you resolve it?
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    The short story is he apologized and deleted his review. But I have to wonder, what if I had not of had his number to call him back.....
  • thecardoc3thecardoc3 Member Posts: 5,848
    Well, that ended quickly didn't it? Did Spencer appear to be some sort of loonie that would be ignored by other potential customers? Does the fact that his hanging up when he wasn't happy that I couldn't take his car right then and there and then fabricated the rest of his review mesh with the perception that others want to portray towards online reviews? It only takes one bully, one very selfish bully to hurt a small business online and there is IMO no way to justify it. Just imagine someone having a nightmare random failure and trying to find someone with the talent, tools and patience to deal with it and they see that review. All the hard work, sacrifice and investment to really be service ready for them might suddenly not mean a thing.

    The offer to edit the response as I wrote it was nice, but you're missing the big picture. Being forced to respond to it in the first place is no different than having the school yard bully kick you in the shins, take your lunch money and expect you to apologize to him for his trouble. You may not agree with that, but you also are very unlikely to be victimized by someone like that too. You are also unlikely to recognize how consumerism and classic business responses to most complaints has served to train some people to believe that they will be rewarded for that kind of behavior. Just because you don't see it that way for what ever reason does not make that inaccurate. It might not be common, but it is a very real problem that is exploited by "some consumers" at the businesses, and the rest of its customer's expense. As I said, I may have dodged a bullet this time, and every business runs into one of these predators from time to time. If there is no way to genuinely fight back and try to protect ourselves from that, the people in such businesses may well eventually decide that it just isn't worth it and leave everyone standing there wondering what do they do now without us.

    I can see someone right now getting ready to write a response and they will try and say don't take it so personal, and to that I'll say that's how clueless (remember, don't take that personal either) some people really are as to just what this career has demanded of techs who have worked this hard to try to master the tasks that we are asked to perform. We took on the challenges of getting more advanced educations, and investing in tools and building the experience through-out our careers at such a significant personal expense that we wouldn't have done it unless it mattered to us as much as it really did. That's a passion for what we do that seems to be all but invisible to so many, but needs to be recognized and appreciated or there is no reason for anyone else to ever try and that's the big picture. I can deal with the Spencer's but you can't make someone else do that especially with all of the other challenges we have to wrestle with. You may think this rant was all about me but I assure you it is not, it's about the next generation of techs that don't deserve to be treated the way we have been.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    There is no defense against Spencers. If you don't want to brave the perils of the Internet, then you shouldn't expose yourself within it if you can avoid it. If you can't avoid it, then you have to deal with it. Yelp isn't going away.
  • andres3andres3 Member Posts: 13,934

    There is no defense against Spencers. If you don't want to brave the perils of the Internet, then you shouldn't expose yourself within it if you can avoid it. If you can't avoid it, then you have to deal with it. Yelp isn't going away.

    Some shops operate "by appointment only." They don't just take in any vagabond that comes walking in.
    '18 Porsche Macan Turbo, '16 Audi TTS, Wife's '19 VW Tiguan SEL 4-Motion
  • steverstever Guest Posts: 52,454
    This was a phone call. How do you make an appointment unless by phone or email or a walk-in request? Guy couldn't get in immediately and wrote a negative review.
  • thecardoc3thecardoc3 Member Posts: 5,848

    There is no defense against Spencers. If you don't want to brave the perils of the Internet, then you shouldn't expose yourself within it if you can avoid it. If you can't avoid it, then you have to deal with it. Yelp isn't going away.

    When this is the case, then you the consumer ultimately lose, and deservedly so. It's naïve to believe otherwise.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Well it's a question of discernment when you're dealing with the internet. Some consumers have it, some don't.
  • steverstever Guest Posts: 52,454
    Motor mount?
  • thecardoc3thecardoc3 Member Posts: 5,848
    Got nothing on that. Would have to see it and exactly how it is moving first hand and then see if there is any other symptoms of some kind.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    I couldn't make sense out of it either.
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    One of the phone calls from yesterday turned into a first time visitor to my shop. He had been referred to us by another shop. Kevin wrote this in a review today.

    I brought in a new intermittent no start/stall problem. Got a chance to watch him methodically troubleshoot the root cause. Thank goodness that someone understands what it means when I ask you to find the problem and fix it. Repeat customer for life now.

    He's been fighting this for several weeks and had a $1900 estimate from a local dealer to replace the throttle body control module, the fuel pump, the PCM, and he couldn't even tell me what else. The failure didn't occur right away, but when it did it set four trouble codes simultaneously. A normal strategy in this case is to pick the easiest of the codes to trouble shoot and go right at it. The easiest of the codes that was setting was the canister purge valve circuit code. The PCM controls the ground connection so when the valve is off, the voltage should be high and when its on it should be low. The code sets when the voltage at the PCM is incorrect for the command. A quick test confirmed there was no voltage to the purge valve, and there was no voltage to the fuse that powers it. There was also no power to the other fuses that controlled the other circuits that were coding, proving a common failure.

    The job took a strange turn when service information for 2006 didn't match the vehicle exactly. The 2007 schematic however did replicate the circuit more closely, with the relay location that provided power to all of the fuses involved matching. The time to solve the problem once it occurred was less than ten minutes. Without the problem occurring, there would be no way to accurately prove what the failure really was.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    And so what causes the power failure? Bad relay?

  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    Consider this. It doesn't actually matter what the final solution was. The odds of ever seeing this same failure a second time probably rival hitting the Powerball. But with the right approach a properly trained technician solves each failure efficiently, every time, no matter what it is. I was working on a second vehicle at the same time that I had that Yukon in the shop. It was a Chevrolet Venture Van from another shop that was setting a P0466 Canister vent valve performance. The first thing I noticed was the fuel tank pressure sensor voltage was at 2.6v with the engine running. I removed the gas cap and it still reported 2.6v. With the key on, engine off the sensor reported 1.4v. Five minutes later their tech was on the road headed back to their shop with the necessary repair in hand. There was a third vehicle in the shop at the same time as the other two and I did not get to repair it at this time. The shop that brought it to me needs to talk to the owner and get authorization for communication network diagnostics. The vehicle owner bought and installed the ABS module for some unreported reason and took it to this other shop to have it programmed. They couldn't figure out what was wrong and thought they had a tooling issue when they failed to program the new module and asked me to double check for them. It's definitely a vehicle issue something in the vehicle is disrupting communication with that module that's going to have to be figured out to complete the repair.

    Yelp and other online review stuff probably isn't going away as you say but everyone also has to accept that none of that stuff can result in any increase or improvement in what I, or any other tech/shop like me/mine are already doing. The best they can actually do is just leave us alone, since just about anything else they do can only hurt us and that does not help anyone. Just like Spencer proved he can only be a subtraction from the overall picture and the same goes for the rest of the critics. They actually do nothing to improve the situation, they really only make things worse.
  • guitarzanguitarzan Member Posts: 873
    edited November 2016
    Kevin, in his review, if he didn't, should have mentioned the dollar value of the other estimates he got. (Maybe you didn't quote the entire post, I don't know.) Everyone can relate to being quoted a couple grand then getting a cheap fix. If you had 10 posts with such wording, I suspect that would send a lot of people your way.
  • thecardoc3thecardoc3 Member Posts: 5,848
    guitarzan said:

    Kevin, in his review, if he didn't, should have mentioned the dollar value of the other estimates he got. (Maybe you didn't quote the entire post, I don't know.) Everyone can relate to being quoted a couple grand then getting a cheap fix. If you had 10 posts with such wording, I suspect that would send a lot of people your way.

    What if his fix wasn't cheap? Simply accurate?
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    By consenting to accept the mantle of "The Garage of Last Resort" you are, in a way, also opening yourself up to raised expectations on the part of your clients.
  • xwesxxwesx Member Posts: 17,688
    By consenting to accept the mantle of "The Garage of Last Resort" you are, in a way, also opening yourself up to raised expectations on the part of your clients.
    Something tells me that he is up for that particular challenge.  Perhaps the more difficult part is reasonable payment for the quality of said work.  
    2018 Subaru Crosstrek, 2014 Audi Q7 TDI, 2013 Subaru Forester, 2013 Ford F250 Lariat D, 1976 Ford F250, 1969 Chevrolet C20, 1969 Ford Econoline 100
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    edited November 2016
    Well that's the rub. The customer is expecting Doc to be a magician, which he is, but they want the magic to happen quickly. It's like when your regular doctor refers you to a specialist, and this guru examines you carefully and then says "Well, I'm not quite sure yet. We'll have to do more testing"

    But...but....you're a SPECIALIST! Fix me!
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    In the medical reference above the specialist operates on a completely different level than the family physician in every way except one, the number of patients they both see. The specialist would likely be seeing fewer people each day. They studied and practiced longer before entering the field and justifiably that affects their pricing accordingly. Without real rewards for someone who made that effort you could wind up not having that specialist available should the day come that you need him/her.

    Compare that to an automobile technician's career where the idea that the "cheap fix" is the most treasured by the consumer but adds up to the harder you work, invest and study the less you are supposed to make for having done so. We still have to do the full range of work but to be valued, really valued we have to be faster and cheaper (think flat rate, especially under warranty) and yet still perfect with the results. Leave one fingerprint behind somewhere and suddenly no matter what we actually accomplished it's one star. There is no tolerance for any failure of any kind, and you quite often deal with all kinds of nonsense even if you did achieve perfection in a given service.

    You would probably have to experience this first hand to really appreciate what it has been like but try these two scenario's.
    1. You get a vehicle with a given problem and you diligently perform the diagnostic routine exactly as you were taught and how manufacturer directs it to be done and you correctly identify the cause of a given failure. For your effort you are told "I don't know what you did all of that testing for, everybody knows that XXX is what was wrong with the car". What's worse is in the end the time that you did invest in testing you don't get paid for.

    2. You get an identical vehicle in with the exact same complaint as the first one so you replace XXX and this time it doesn't fix it and the car comes back with the same problem. Now you are told "Why didn't you test and prove that was wrong instead of just throwing a part at it?" It's as if scenario #1 never happened.

    It is wrong for the techs to not test and prove what is going on that is causing a given symptom/trouble code. But yet there isn't anywhere that you can look and not find some kind of pressure to not do the diagnostics and just throw parts at the car. Just think about every CarMD add you ever saw, think about every request for help here that was about someone NOT paying a shop/tech to figure out the problem that someone's car was giving them. Think about every time that someone reported some vehicle symptom and someone tried to tell them to change what ever parts to see if that fixed it. Even some parts stores were pushing pull a code, print out a list of "possible" causes and the list of most likely parts to throw at it.

    Now picture yourself working hard all day long while trying to let all of that roll off your back, and then spend more time studying each and every night trying to improve your training and skills and you'll have a pretty good idea of what it has taken to get to the top of the trade. Only to have someone who can write, occasionally drive fast on the weekend, hasn't had as much as a screwdriver in their hands in decades, are totally clueless about the tools and routines that have to be deployed to do the work, and they present themselves as the authority on what you should be charging.....


  • steverstever Guest Posts: 52,454
    edited November 2016

    In the medical reference above the specialist operates on a completely different level than the family physician in every way except one, the number of patients they both see. The specialist would likely be seeing fewer people each day.

    That hasn't been our experience, at least with surgeons. One guy I know does the usual 15 minute blocks all day long for his follow-ups, and works half day Saturdays to keep up since he has two surgical days a week that interfere with the consultations. And his Friday office hours usually extend to 8 pm. Luckily (I guess), his wife is a surgeon; can't imagine their family "life".

    That's exactly the kind of doc you want if you need to be cut on - one specializing in one relatively narrow area of expertise and one that does literally thousands of the same procedure. Expensive, yes, but faster and cheaper in the long run when you get great results. Not counting my 7 eye procedures, we're up to three major (i.e., not outpatient) surgeries in this household.

    And you complain about the cost of tools and subscriptions - my newest dentist is a bit of a gadget nut and I got to see my crown being made in his office while I waited. No going back a week later, no temp filling. 3D pics of my teeth too. Fun stuff.

    And yeah, every time we need work done, we diligently research the procedures, surgical or treatment options and the doc's credentials and their reviews and read the literature and get recommendations from friends. And we quiz the docs before we hire them, and we get second opinions. And we've certainly looked up medical conditions online and cured ourselves without doctor advice (Epley maneuver, plantar fasciitis , yada yada).

    Oh, and when we go to our docs, they bill some humongous amount that our insurance company then whacks down to about 20% of what they try to charge. Just like a car manufacturer does with their dealers. :D

    Not really much different from your work from my point of view.

  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    edited November 2016
    These are communications problems. If this is what's happening to you, then you aren't making clear what you do and how you charge for what you do.

    A repair shop also has to develop an instinct for problem customers, whether that be verbally or with body language. If someone comes into your shop talking about how they were "ripped off" and how "some idiot" couldn't fix his car, you are already in trouble. It's like meeting a woman on a first date who begins to tell you of how she stabbed her ex with a pair of scissors.

    Do you have a rule in your state, like in California, where you have to give a written estimate?

    California Law:

    By law, the auto repair shop must provide a written estimate before doing any work. After you have received the estimate, feel free to go to another shop for a second opinion.

    A written estimate must include the total estimated price for parts and labor for a specified repair or service. The estimate must also itemize the parts to be used and the method of repair. The repair shop must stick to the method of repair and the parts listed unless you agree in advance to any changes.

    In addition to the total amount, the estimate may itemize the parts to be used and the method of repair. If so, the repair shop must stick to it. They may not legally substitute parts or change the repair method without your consent.

    The technician will ask you to sign the estimate/work order, which gives the shop permission to proceed with the work. If you want any of the parts returned to you, be sure to say so when the technician gives you the estimate.

    Before you sign, be sure you understand the work the technician will do. Your signature means you agree to pay for the repairs up to the amount specified. Do not sign a blank work order.

    Newer cars often need a diagnosis before repairs can be done. A diagnosis uses procedures established by the auto manufacturer to determine the cause of the malfunction. The estimate may cover the cost of the diagnosis alone, or the cost of diagnosis and repair.

    If some of the work will be done at a different shop, it must be noted on the written estimate or work order. For example, auto body shops sometimes have auto glass shops replace damaged windshields. If so, the shop must get your permission, unless you cannot reasonably be notified.


  • thecardoc3thecardoc3 Member Posts: 5,848
    stever said:

    The specialist would likely be seeing fewer people each day.

    That hasn't been our experience, at least with surgeons. One guy I know does the usual 15 minute blocks all day long for his follow-ups, and works half day Saturdays to keep up since he has two surgical days a week that interfere with the consultations. And his Friday office hours usually extend to 8 pm. Luckily (I guess), his wife is a surgeon; can't imagine their family "life".
    My wife's neurosurgeon who removed her right temporal lobe trying to stop her seizures did one surgery, and one diagnostic implant each week. It took a more than year for her to even get her turn with him, and it would have been longer but her condition degraded to the point that they considered her seizures were advancing to the point that her life was being threatened. Dr. R. was so specialized that it was another neurologist/ epilepsy specialist Dr. B. who was in charge of the testing and mapping of the brain in order for them to decide if the surgery was even possible. BTW. They are worth every penny they get, and then some.

  • thecardoc3thecardoc3 Member Posts: 5,848

    These are communications problems. If this is what's happening to you, then you aren't making clear what you do and how you charge for what you do.

    In my shop, we moved well past most of the normal problems that faced the trade, but could not always escape some of the inaccurate stereotypes.


    A repair shop also has to develop an instinct for problem customers, whether that be verbally or with body language. If someone comes into your shop talking about how they were "ripped off" and how "some idiot" couldn't fix his car, you are already in trouble. It's like meeting a woman on a first date who begins to tell you of how she stabbed her ex with a pair of scissors.

    Why does Spencer to mind right now.....


    Do you have a rule in your state, like in California, where you have to give a written estimate?

    No we don't and while having something like that would make improvements in a lot of areas, it also carries with it some outdated perceptions that can often bring certain unnecessary challenges for shops in California. Having the law is better than not, but its in serious need of updating.

    Pa. Is redesigning it's emissions program, and part of the restructuring is going to follow an outline that I wrote some ten years ago and some of it is going to repeat the same old mistakes of previous versions. Instead of having a system where computers are used to make the job easier and have it eliminate mistakes the program is being deliberately written to allow specific errors to happen so that they can be caught and prosecuted. That way Parsons has the appearance of having control and oversight of the program. It's kind of like if they don't catch somebody doing something wrong, then they aren't doing their jobs. If that's not bad enough the program is going to require that the shops buy yet another new emissions machine with the estimates again being in the $6000-$9000 range. All they really need for the new program is for a shop to have an internet capable PC or laptop, the peripherals required to connect to the car's ALDL and test the gas cap and an external hard drive or memory stick for data storage/recovery. The cost should be less than $600 for a new shop as long as they already have a PC and internet support.

    The last generation of machines which will expire and have to be replaced some time next year were supposed to also allow the shop to use the machine as a scan tool for diagnostics and be able to access the net (dial-up) to be used as a shop computer for service information. Neither of those extra capabilities ever lived up to the original promises. Diagnostics amounted to retrieving monitor readiness data, pulling and clearing codes. Internet capabilities again were limited to dial-up (Windows 98) and updates and anti-virus software could not be installed because of the state's system restrictions. That meant if you even tried to use it on the net it filled up with all kinds of garbage and the shops were powerless to do anything about it.
  • roadburnerroadburner Member Posts: 18,331
    This morning I overheard one of our service advisors going over the results of a vehicle inspection with one of our customers. Among other things, they found that the OEM staggered tires had been rotated so that the wider tires were now on the front...

    Mine: 1995 318ti Club Sport-2020 C43-1996 Speed Triple Challenge Cup Replica
    Wife's: 2021 Sahara 4xe
    Son's: 2018 330i xDrive

  • thecardoc3thecardoc3 Member Posts: 5,848
    And the assumption(s) is (are)?

    How do the assumptions address the core issue?

    Is it more important to be able to lay blame, or should more energy be put towards dealing with the fundamental reasons why things like this occur?
  • roadburnerroadburner Member Posts: 18,331
    Easy- someone was either not trained properly or wasn't paying attention and/or didn't care.
    After all. it's not like staggered tire setups are all that rare anymore.

    Mine: 1995 318ti Club Sport-2020 C43-1996 Speed Triple Challenge Cup Replica
    Wife's: 2021 Sahara 4xe
    Son's: 2018 330i xDrive

  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    You'd better lay blame if someone in your organization is doing dumb stuff like that. Your business in on the line with that kind of liability.
  • thecardoc3thecardoc3 Member Posts: 5,848

    Easy- someone was either not trained properly

    Let's stop right there with that one. Fix that one and then compensate correctly and the other two possibilities would take care of themselves.


  • thecardoc3thecardoc3 Member Posts: 5,848
    HCCI is what is described in this article but that is not what is pictured.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Oh that idea has been around a long time. I don't think anyone has yet solved the detonation issues.
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    GM has come a long way because of GDI but there are still major emissions hurdles to figure out. BTW the design still needs ignition instead of just going compression like a diesel. They use a laser system to provide "spark". I got a laugh because of the picture, essentially a hobby engine like what you would find in model aircraft that uses a glow plug.
  • thecardoc3thecardoc3 Member Posts: 5,848
    Another perception about an old and on-going problem. help wanted
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    One thing none of these articles touch upon is how much the environment of the workplace is a big turn-off for young people considering a car as an automotive technician. On the one extreme you have really disgusting conditions in the repair shop; on the other extreme you have a very neat and tidy service facility with utterly awful management. Who wants to work for a business that customers hate coming to?
  • thecardoc3thecardoc3 Member Posts: 5,848
    That does make it rough....
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    How many times have you heard or said "You Get What You Pay For"? There are a number of different situations where that phrase used in context can mean everything from a great value can be pricey to the polar opposite of going for the cheap price first can teach some painful lessons.

    So have you ever realized when you got something that you definitely didn't pay for? Contrary to the stereotype many automotive service customers often receive much more then they actually paid for and that is measured by customarily unpaid hours when a technician has to solve a complicated issue. The GMC Envoy referenced earlier with the Google review is a fine example of what has been going on behind the scenes that everyone needs to learn about.

    When K.B. brought his Envoy in it would randomly quit and not restart. When that happened a number of warning lights would come on the dash and the vehicle would set numerous codes including codes referencing the throttle body control system and stabilitrak system among others. He drove it to the shop and allowed it to sit for a period of time that would usually result in the problem occurring. Unfortunately the vehicle restarted and ran normally. At this point it was still prudent to pull codes and take a good look at system data to get a baseline understanding of the vehicles current condition. Codes P0443, P0449, P0689, P1516, P1634, P2101, P2534 were all historical with the P0449 Canister Vent solenoid circuit code current. Otherwise there was nothing else noteworthy observed. At this point there could be no real progress made without the problem occurring.

    I had several other vehicle problems to investigate at the same time, so it was time to concentrate on work that could be completed while patiently waiting for a failure event to occur. K.B. elected to leave the vehicle and arranged for a ride but in the mean time he went about randomly restarting the Envoy in the hope that it would act up. As it usually is, patience was soon rewarded and the stall no-start occurred.

    Since no real diagnostics had ever been done this no-start was treated exactly the same as any other and that is prove what is working and what is not. The fuel pump was turning on and providing 65psi fuel pressure, but there was neither spark nor fuel injector pulse. Connecting the scan tool showed that about half of the previously listed codes were now current failures. There was now a chance to narrow the focus and since there were several codes active its up to the technicians discretion which circuit to troubleshoot first and the easiest of all of them was the P0443, canister purge solenoid circuit. The schematic showed the purge valve gets power from fuse #26 in the under hood fuse block and the PCM controls the ground circuit for it. Testing for power to the purge solenoid showed 0v, testing for power to fuse #26 showed it dead, as well as fuses #23, #31, #54, #55, #56.

    Using a fused jumper and applying power to the pink wire at the purge valve showed power was then available to each of the fuses that were previously dead. Reaching in the window to crank the engine it fired right up. Disconnecting the jumper, the engine died again. The diagnosis at this point was the powertrain control relay was not powering up the circuits that relied on it. This is exactly what K.B. saw be confirmed in about five minutes. What he didn't see is just what it took to prove exactly what was wrong this time which required several failure events occurring as testing points were chosen and measured in order to prove the exact failure. This is where the proof that many vehicle owners have gotten much that they didn't pay for will be revealed. Keep in mind even this work is something that done by anyone else would likely earn them an entire months income, if not more.
  • steverstever Guest Posts: 52,454
    edited November 2016
    Sometimes you get a good deal for nothing. I got a free hotel room one time when the credit card machine was busted and the desk manager just comped me.

    Lots of times you pay a lot and don't "Get What You Pay For".

    (re " K.B. elected to leave the vehicle and arranged for a ride but in the mean time he went about randomly restarting the Envoy in the hope that it would act up. As it usually is, patience was soon rewarded and the stall no-start occurred.", did you mean you would randomly restart the Envoy in the shop?)
  • thecardoc3thecardoc3 Member Posts: 5,848
    edited November 2016
    Getting something that you aren't paying for, haven't paid for. Maybe you knew it was happening, maybe you didn't. It's common that the usual attitude when told about this is "why should the consumer care"? They are "consumers" and as long as something is there for their consumption end of story.

    The approach to any random electrical failure requires the technician to study the circuit and identify the potential faults that could result in the symptom(s) as observed. In the case of this Envoy losing power output from the powertrain control relay caused the stall, no-start and was generating numerous trouble codes. K.B. had initially reported many more codes as being set than were currently observed, the fact that previous attempts to diagnose and repair this had been undertaken likely accounted for the fact that a number of them had been cleared and had not reset at this point. The only thing to do at this point is concentrate on exactly what could be proven. Anything beyond that is out of the technicians control and does not equal being a mistake even if the car does have to come back for additional repairs.

    Testing at this point needed to concentrate on why the relay wasn't powering the circuits that it is responsible for. With any relay controlled circuit there are essentially two sets of possible failures, the control side or the controlled side. Once it is determined which one of them is breaking down then the diagnostics shift to prove if the failure is the supply side, output side or load and then finally exactly why and where. With a relay that is mounted in a fuse block assembly a common routine is to install a pedestal that provides test points with the relay active as seen in this picture.


  • steverstever Guest Posts: 52,454
    Seems to me that the software generating the codes is lame. That should improve over time so that the possible option list gets whittled down so that there aren't so many false positives generated.
  • thecardoc3thecardoc3 Member Posts: 5,848
    This next step proved that the failure was in the control side, specifically the PCM's control of the ground side of the circuit that commanded the relay on. Go to any electrical diagnostic class and they will teach you that certain circuits should have voltage drops occurring when active that fall into predictable ranges. A relay control circuit like this one carries very little current, so beyond the voltage drop that occurs across the driver's junction and the PCM's ground this should be under .3v. As you can see in this photo taken before the vehicle acted up again the voltage drop is excessive with the vehicle otherwise operating normally.



    It would be very easy for someone to go after this confirmed issue right now, however experience has taught a hard lesson. Until the failure is truly associated to "THE" problem, it is only "A" problem. This is also one of the points where we get into the things that the consumer hasn't been paying for. When doing diagnostics manufacturers taught that the techs needed to follow the trouble trees that they produced. Trouble trees are limited to testing circuits for powers, grounds, opens and incorrect resistance values. The majority of these tests are done with the circuit being disabled for testing and in the event that there is a hard circuit failure sufficient.

    Trouble trees do not work for random or intermittent failures unless the circuit stays dead long enough to permit it. Meanwhile the effort of disconnecting portions of the circuit to do any testing always has the specter of accidently disturbing the failure and restoring the circuit before the failure is identified. These two factors often lead to misdiagnosis again because a trouble tree cannot account for the characteristics of a circuit changing in the middle of testing. While techs got the majority of blame for the failures that would naturally occur with such a system outside pressures compounded the problem even more. Each of these could turn into their own essays but for now lets just leave them at titles.

    A tech spends time testing and proving exactly what is wrong only to be told 'I don't know what you did all of that testing for, everyone knew that XXXX was wrong with the car".

    Which led to a tech not testing the next time and "IF" the same repair as the previous example turned around and failed to solve a vehicle problem then he/she was told "Why didn't you test anything?"

    People on the outside made this problem even worse when companies like CarMd tried to preach that shops who were charging for diagnostics were ripping off consumers when all someone had to do was pull a code and that told them what was wrong with the car. Shops in turn often pressured the techs to try to go too fast by failing to pay them for diagnostics correctly if at all. Meanwhile top techs would be dealing with problems like this Envoy unpaid for their time and often denigrated for even trying. Seeing statements like "He's an ASE Master Technician and he can't fix a sandwich" are part of that picture. Other insults such as "You said you were a certified master technician, why don't you know what is wrong with that car?" were common, heck are still common occurrences today. That's one of the greatest myths about the work that diagnostic technicians do, that we somehow know what's wrong with a car, or that anyone does from the symptom alone. The greatest myth of all is that if someone would happen to manage to guess a solution to a problem correctly that it confirms the validity of the attempt and discredits someone taking a patient, disciplined approach. The end does not always justify the means and the voltage drop for the relay control in this Envoy's PCM is the perfect trap to prove just that point.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    So was it the relay or the PCM itself? You indicated that the relay wasn't grounding.
  • thecardoc3thecardoc3 Member Posts: 5,848
    Traps. They are everywhere in a technicians career. They are easy to fall into, and very hard to resist hence the designation of "A Trap". The Envoy took more than an hour to act up again after the initial event. In a shop situation a productive technician will try and stay busy dealing with another vehicle so he/she can try to earn a living while being ready to jump off of that one and get back onto the more difficult task. You have already been tipped off to the fact that the PCM is NOT the failure even though it is a confirmed problem. When the car acted back up this is what was observed.



    That is the voltage drop on the ground side of the relay control circuit. Testing needs to prove if the PCM itself is simply not turning the relay on, or if the circuit failed in between. By setting test points in advance of the failure this is information that can be gathered pretty easily. Using a testlight to see if the computer was trying to turn the relay on or not during the failure this information was obtained.



    This step proved that the failure that brought the car in the door wasn't inside the PCM no matter what else was going on. Testing now shifts to confirming the wiring integrity as well as the connections at the PCM as well as the fuse block. These steps each lead to their own challenges since the fuse block connections are not accessible with the fuse block in the car and the circuits live. Normal testing such as steps directed by what the manufacturer would have a technician perform, when following a trouble tree will be displayed in the next few photos.




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