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I did browse through the vwvortex forum and noticed that a number of people whose car had similar symptoms said that the problem was due to a damaged coilpack. Could this be the case for my car as well?
Here are some details of what exactly went wrong with the car after the belt and tensioner were changed: While driving on damp, snowy slushy night, the car starts to jerk and CEL flashes at a speed of around 30 mph and high RPM (because the tires were slipping I need the high RPM). Since I was not far from home, I quickly returned and parked the car to check if the belt had come off. Everything seemed fine. The next day I drove it around and noticed that the car would rev but the power would not transfer to the wheels. The car is automatic, so it almost seemed that the car was not changing gears. At this point I drove it to the dealer who the next day tells me that I need a new MAF and temp sensor. I specifically asked him whether this would solve the acceleration problem and he assured me it would. But after putting in the new parts he tells me that the car is no longer revving past 5000 and that I may need a new engine!
Let's assume that the mechanic at the dealership is either very incompetant or is just ripping me off (or both). Given the symptoms I have described above could the problem be with the coilpacks being cracked? Perhaps the dealer overlooked this scenario or wants me to come back and pay him more to diagnose it (which I refuse to do).
Any thoughts?
First up, agree with most things bpeebles said. You NEED to find a competent, VW-experienced mechanic. Good luck.
Secondly, and no offense intended, it appears that you have close to "zero" automotive knowledge. That's ok, but you have to realize it, and it makes it difficult for you to figure out what's going on.
The coil packs are a common failure, but I *thought* -- don't *know* -- that it was confined to the 1.8 turbo engine.
You appear to be correct about the timing chain; the gates list (www.gates.com) shows no belt for this appplication.
If your problem is low power + CEL, have the code pulled -- many parts stores do this -- and let the car tell you what's going on. Having the engine rev and the speed not increase would mean serious transmission failure; I kind of doubt that that is really going on.
Lessee "The next day I drove it around and noticed that the car would rev but the power would not transfer to the wheels. The car is automatic, so it almost seemed that the car was not changing gears."
Sorry, "rev but not transfer to wheels" means very little to me... maybe transmission slipping?? Even in an automatic, at steady speed, rpm is proportional to velocity in any given gear....
"not changing gears" is a completely different problem and is easy to diagnose... just use the gear selector to force the car to hold a lower gear and see if that's what the car is doing.
But basically, I don't understand what you're saying. It all boils down to this: You need a good mechanic.
BTW, MAF is a "mass air flow" sensor, nothing to do with a filter. And yeah, if that puppy goes, you'll have CEL + driveability problems.
Good luck,
-Mathias
[who is driving Toyotas until he's got time again for 'temperamental' cars]
You are correct my knowledge of car is close to zero, although I am learning...
Since the problem is rather peculiar it is hard to describe but let me try again. First of all the car starts and idles just fine (albeit with the CEL on all the time). Now let's put it in drive and slowly pull away. Still fine. Next hard accelerate (slam the accelerator) and see how quickly we can get away. The car revs to 4500-5000 (but no more) will speed up to 30-40 mph in decent time. Slightly release the accelarator so that the RPM needle drops to 3000 and a speed of say 45. Slam the pedal again so that RPM shoots to 4500-5000 range (again it seems to go no more then this). The car will speed up but the rate of acceleration, say from 45 to 65 is *very* slow. Since at this point the car is still revving and burning gas, I ease on the accelerator so the RPM drops to 3500.
Now rather than slamming accelerator, I gradually accelerate so that RPM goes from 3000 to 4000 gradually and comes down on its own (without me taking my foot of the accelerator). Doing so it appears the rate of acceleration is much better I am able to get to 65 mph from 45 mph using this gradual and "gentle approach" The car still reaches high speed (I touched 95 mph) and I drove on cruise control at 75 mph (with RPM around the normal 3000 to 3500 range). The car is burning gas rather quickly, but that could be due to the high revving that I have been doing to diagnose the problem.
I hope this clarifies the problem What do you think? Engine problem? Transmission? Coilpack? or what?
As always, your responses will be much appreciated.
This is built into the system to help reduce the chances of mechanical damage when one of the sensors or servos have been detected as giving incorrect data.
Instead of using the (incorrect) data from a failed sensor, a predetermined setting is used. (this is limp mode)
I know little about the VW automatic xmissions but suspect that the computer can alter its characteristics under limp mode condtions too.
Is this perhaps what you are encountering?
Anyway, one of the mechanics was nice enough to quickly run the vag on the car. The codes it read out were P0420 (Catalyst system), another one had to do with the knock sensor (don't know the code) and two others had to do with misfires on cylinders 3 and 6. Anyone care to interpret and suggest what the problem may be?
I had the mechanic reset the codes, but the car still would not rev past 5K. I doubt then it is in limp mode (should have come out of limp after codes were reset, no?).
I spoke to the dealer who changed the MAF and temp sensors and he says that the coilpacks on the car were okay when he looked at it. He still thinks it is an engine problem even though he did not do a compression check on the valves. He has never heard of the limp mode.
Since it almost feels that the car is having truoble with the transmission, could the trasmission control module be at fault?
Will have to deal with this after the holidays. Thanks bpeebles and stein13 for taking the time to reply.
After going thru the coil problems in the first year of owning my car and all the run around my dealership gave me, I really don't trust them. Before I bring my car in again, I'd like to know if this is something that would be covered under the warranty. Also, is it normal for a somewhat new car to run so badly in the cold weahter? And does anyone know another reason why the coolant light would come on, other than to check the coolant level?
Any help would be appreciated. Thank you!
A FLASHING coolant light means low coolant in the resevour.
A STEADY-ON coolant light is NOT caused by low coolant in the resevour. It is most often caused by overtemp condition... but this obviously is not happening right after startup.
We would need more specific information pertaining to the conditions which the light fuirst came on in relation to any other observed symptoms.
EXAMPLE: (Pure speculation) It is possible that you "ORIGINALLY" had a simple low-antifreeze condition.... but left unattended led to an engine overheat condtion which warped the head. Now, when a hot engine with a warped head is turned off, the pressure in the coolant system can 'push' some antifreeze into one or more cylinders. This then leads to hard starting and rough running when the enging is cold. Once the engine warms up, the engine may seem to run just fine.
Keep in mind that the above is a WORST CASE SCENERAO. I can think of several other sceneraos that may have occoured too. That is why it is VITAL that if wish to receive better diagnosis, we need specifics. Obviously there is more happening here than a simple light on the dashboard since you also are complaining of poor running under some conditions.
To answer your othe questions:
OF COURSE this is covered under warantee!
NO, it is not 'normal' for any VW to run pooly under ANY conditions. (I have had over 5 VWs and currently have 2 in the family.)
...too bad the 1.8T is an AUDI engine ;-)
You have a faulty temp sensor. So when the engine is cold, the sensor tells the computer that it's warm, so the car runs "like crap" -- i.o.w. stumbles, and wants to die. Symptomatic of running too lean when cold. Without idle control, I'd say the engine will want to race, but when you step on the gas, it'll have no power. This is more pronounced with a manual tranny and clutch, of course... it'll feel like absolutely no power at all, but the engine will NOT die in neutral.
The same faulty sensor will turn on the "overheated" condition. Now I don't know how many coolant sensors there are, but I'd start replacing the ones that don't require draining the cooling system and take it from there.
Trust me, this is a much better scenario than the "warped head" one... only time will tell which it is, or whether it's something else altogether.
Have fun,
-Mathias
I have seen cases where one falty sensor can really cause problems. The best the onboard computer can do is to light up the coolant light to tell the operator that there is a problem. Any COMPETENT VW mechanic can quickly isolate a bad sensor with an ohmmeter. Somone that 'shotguns' the problem by replacing all of the sensors is just costing you money.
In fact, I would start by simple REPLUGGING the connectors on the sensors. A bad connection is the most likely cause.
Then I might try SWAPPING the connectors. (I beleive that they are identical and close enough to be swapped.)
Thanks again for your help.
i miss my Jettas a lot, but not all of the time
Good luck.
I have heard of folks that ran the wrong kind of oil in their TDI have some wear patterns show up on the Camshaft. Are you sure you were using the recommended synthetic engine oil? (never EVER take a TDI to a quiky-lube place they do not even stock the proper oil for a TDI engine)
BTW: There are no "lifters" in any VW engine... they are all overhead camshafts. The Cam works directly on the Valve. (some cam-followers are "solid", some "hydrolic" depending on the model year.) I hope you did not pay for lifters.
I do not know a great deal about engines and I trusted what my mechanic told me. I hope this can help you in some way, if not, there are some really helpful people who post here that can.
Good luck.
Is it worth fixing? This car has given me nothing but problems.
I paid about $1500 to have the head removed, machined and valvejob while it was apart. This engine went well over 160,000 miles and was running fine when I traded it for my Jetta. I felt it was well worth the cost. I measured the $1500 against what I could buy for that same cost and it was OBVIOUS that it was a good investment. (The vehicle was otherwise meticulously maintained running Mobil1 oil since new.)
You need do decide for yourself what is the best way to go for yourself. Personally, I drive my vehicles into the ground until there is virtually no value left. (over 12 years) By then, I have saved enough to pay CASH for my next vehicle 8-)
I guess VW marketing, so as not to confuse the general public and to differentiate against the solid shims used in their previous engines, decided to call the hydraulic adjusters 'lifters'. It is not uncommon for marketing folks to take leeway as they create pamphlets, sales broschures...etc.
In any case, the proper termonoligy is "hydraulic valve lash adjusters" and their purpose is to constantly remove all "play" from the valvetrain by keeping constant pressure on the cam lobes. This is accomplished with springs and oil pressure. When the hydraulic adjusters start to wear out, the engine will rattle like a diesel when first started after sitting overnight.
with 287,000 miles on it. It has been running great, my kid took it back to school in N.Y. jan 1, yesterday she called me
to say that the oil warning light came on, and that there is a beeping noise coming from the dash.
I had her check the oil, I had just changed it before she went back, it was fine,she said the car is not making any noises out of the ordinary, no smoke from the exhaust,and that the warning light only comes on after the car has been running for fifteen minutes or so. I used 10/30 Pennsoil on the last oil change. Could someone tell me at what oil pressure the warning light come on, and how does the oil pump in a 96 jetta work?
thanks
VW uses 2 oil-pressure senders that not only measure overall PRESSURE but also calculate the DIFFERENTIAL from the pump to the end of the oil-galleys. It is not uncommon in VWs for one of the senders to become overly sensitive and give false alerts. The only way to know for sure is to measure with a meter.
Somtimes, using oil that wrong viscosity can cause false alerts too. Some folks use "STP oil treatment" or some other oil-viscosity improver to eliminate problems such as this.
I cannot stress enough that you need to KNOW if the oil pressure is really OK by measuring with a meter that screws into the engine before dismissing this as a non-issue.
Somtimes, folks just replace both oil-senders to see if that corrects the problem. I HIGHLY recommend that only BOSH oil-senders are used if you choose to go this route.
QUESTION: Why did you choose to ignore the recommended oil viscosity for this engine and go with 10W30? This is NOT the proper oil for this engine especially in the winter. (it may be part of the problem too.)
Jeremy
10/30 is the proper viscosity down to zero degrees.
This problem happens after car is warmed up. I have been using 10/30 for 7 previous winters with no problem.
I have heard that occasionly Fram oil filters can cause this problem,I use Fram oil filters,have you heard anything about this?
thanks.
http://www.scuderiaciriani.com/rx7/oil_filter_study/
If you really think the oilfilter is causing the problem, it can be easilly replaced without draining the oil. (Just add some oil after to bring up to 'full' again.)
As for the proper viscosity... It was -15F here thismorning. I recall 5W30 being the RECOMMENDED year-round viscosity and the 10W30 being "satisfactory" if the recommended was not available. Use what you wish.
These issues have nothing to do with the interior materials being cheap. Bad design is the fault of these isses, not the materials used. VW's are notorious for their superb design and interior materials. Many car companies freely admit that VW's are the bullseye when it comes to interior design and texture.
I am sorry for your bad VW experience, but to fault the interior materials is a little (or allot) far fetched.
As far as replacing your VW key. Many, if not most, car companies these days use chip technology in their keys to prevent theft. This technology is expensive and to replace a key is also costly for most car brands, not limited to VW.
BTW - I'm glad your okay!
Jeremy
Here's the weird part, this just started happening and the weather outside is below freezing. I normally associate this light as a warning that your car is about to overheat. As a matter of fact, the owner's manual recommends pulling over and letting the engine cool down. Well... it's already below freezing and the car has just been started. I think the engine is plenty cool.
The manual also says the light may come on in cold temperatures, but it doesn't recommend any course of action to take if it does. Also, if it is coming on due to the cold temp, I would think the light would turn off once the engine warmed up, but it doesn't. I've set up an appointment to take it in to be on the safe side, but I don't know if I'm wasting my time. Any comments or suggestions?
Is this a common problem ? Should there be a recall ? Why the back order ?
Just asking..
Cheers
I love the car so far. Have not had any problems while driving. However, it has been exceedlingy cold the past few weeks (below freezing) and I have noticed that sometimes when I first start the car in the morning, it rattles and shakes pretty bad. I then turn it off and turn it on again, and it goes away. It doesn't happen at any other time during the day, just when I first start it in the morning before going to work. The problem did not happen at all when I was living in Atlanta. I moved to Baltimore for work bout 3-4 weeks ago, and i first noticed the problem last week. I haven't had time to go to the dealer yet, but I was wondering if this might have something to do with the cold or something more serious? I just want to know what might be causing this rattling. I am not a big car person and have no clue.
Some people even use a synthetic oil in the winter. It eases starting and improves lubrication. It even adds life to the battery due to greatly reduced cranking loads.
As with any engine, it should be driven gently and not reved until the engine temp gauge moves into the "safe" area. NEVER IDLE A COLD ENGINE VERY LONG.... it is not good for its longevity.
BTW the engine was not totally cold when it happened. I had driven about 15 miles, shut it off, was in a store about 40 minutes before I had the problem when I started the engine to leave.
Last March we bought my fiance a Jetta. When we got home we noticed there was a scratch on the windshield than ran along the path of the wipers. We immediately called and took the car in. They replaced the windshield.
Now, the same thing has happened. the scratched are identical to the previous one. Has anyone else had the same problem?
Getting ready for the 'discussion' with the service Center and would appreciate input from anyone who had similar problems.
Thanks in advance.
I have an appointment at the dealer next week and am sure I'm gonna get cracked. If anyone can please tell me what this part is called and how much I'm looking at to replace it.
Thanks!
Another option is to locate somone that has installed the STEEL skidplate. They are all to glad to sell their perfectly good plastic one to you just to get rid of it.
Here is some info on the STEEL skidplate.
http://members.porchlight.ca/benad/skidplate.htm
This photo shows how STRONG the steel plate is holding the weight of the vehicle.
http://www.dieselgeek.com/skidplate.htm
This is often due to the oil thinning out when it gets hot. Then, at idle, the oil-pump cannot put out enough pressure to satisfy the dual oil-pressure-sensors. Somtimes, this is due to an overly-sensitive oil-pressure-sensor. I have even heard that the oil-pump can get whimpy afte 100K miles or so.
Most people correct this condition by running a slightly thicker oil. You can easilly test this by putting in a can of "STP oil treatment" This stuff is a viscosity-modifier that thickens the oil at higher temperatures. ("STP oil treatment" is thick like honey or molasses)
If running STP makes the problem go away, you will then KNOW that it is an oil-thinning problem.
On my daughters ol VW Golf... after running STP oil treatment a couple of times, the problem was gone. (the oil-pressure lite did not come on any more.) I attributed this to the "STP oil treatment" cleaning the gunk from the inside of the engine.
I do not wish to scare you but there is another possibility in your case.... when the headgasket was leaking, it is possible that the engine ran low on oil. If this is so... then the main (crankshaft) bearings may have been damaged. Scored bearings can also cause low oil pressure. In this case, the only cost-effective corrective action is to run "STP oil treatment" and hope for the best.
Also, as your engine gets older, the viscosity of the oil that you use becomes more of a factor. Since VW engines are designed to run hot, I found that using at least a 15-weight oil or greater (15w40, 20w50) during the hot summer months, and
10-weight oil (10w30, 10w40) during the winter months does the trick. Of course, if you live in a climate that resembles Alaska during the winter, a 0-5 weight oil should be used.
NOTE: The above advice refers to older engines 80,000+ miles. The brand new engines which are built to much closer tolerances should be run with the oil recommended by the manufacturer (5w30, 5w40).
Hope this helps
When was the last time you had your belts checked and/or replaced?