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Engine Hesitation (All makes/models)

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Comments

  • user777user777 Member Posts: 3,341
    careful. not all obd-ii readers are created equal. some don't interface to laptops. also, many don't read the toyota specific parameters. i'd hate to have you capture sub-optimal information, or none at all.
  • 05camry33se05camry33se Member Posts: 67
    Well, we're not talking about a huge investment of time and/or money to try this. If it doesn't work or yields useless information, at least we will have tried. I'd rather give it a shot than do nothing other than continue to just talk about the problem.

    At the same time, I'm realistic about this and am not approaching this with any particular set of expectations. We'll give it a shot and let the chips fall where they may. Better that than to do nothing imho.
  • dla2dla2 Member Posts: 87
    Please keep in mind that it took several hundred miles to be convinced that this was a real problem for me. I tried for a long time to pretend it was not. If I jumped into a car with no prior history of the hesitation and drove for 10 to 15 miles I would most likely think the car functioned properly.
  • wwestwwest Member Posts: 10,706
    The modified MAF/IAT is useless just setting here on my desk so if you will send me an address I will Fedx it immediately.
  • wwestwwest Member Posts: 10,706
    Read posts 836-7 of "Transmission problems with Lexus ES300".
  • white330white330 Member Posts: 4
    It will be interesting to see how the 06's perform.
    Looking at the specs on the 06 RX 330 the hp rating has been down graded to 223 vs. the 230 of my 04' and the estimated gas mileage has been reduced slightly to 19 city / 25 highway vs. my 04 of 20 city/ 26 highway. Could these numbers have something to do with making this engine and transmission shift smoother...based on some of your previous theories I would say it's possible?

    As a side note...I don't make much noise here but do enjoy and appreciate the effort of yourself and the few others that are puttiing forth considerable effort in trying to understand this issue.
  • wwestwwest Member Posts: 10,706
    that the fuel economy rating being lower for a new model is very possibly the result of fixing the engine/throttle hesitation symptom. I would certainly hope so. On the other hand the HP downgrade may simply be the result of the new SAE standards.
  • user777user777 Member Posts: 3,341
    is most likely due to the new SAE standards.
  • mert2mert2 Member Posts: 74
    There's one spot on my drive where the hesitation occurs frequently.... a long street block, slight slope down, with a yield sign at the end.... once I get close to the yield, I brake slightly then accelerate on through the intersection... I've observed that right before I begin my acceleration my RPM is around 1K (i.e. slowest point at the yield sign). Then I apply the gas, and the RPMs shoot up to a little over 3K, the car doesn't gain any speed for about a second (it feels longer, but let's just say around 1 second), then it 'jerks' the car forward.

    This is the thing that bugs me about paying $20K for a car.

    edit: re: 1 second: I brake, look atthe RPMs, look both ways at the intersection, hit the gas, then count "one-one-thousand", slowly, and then the car goes.
  • white330white330 Member Posts: 4
    "This is the thing that bugs me about paying $20K for a car."

    Not to minimize your concern...I agree...I spent $40K for a lux SUV that does the same exact thing...it really bugs me.
  • vehiclevehicle Member Posts: 2
    It seems to be starting in 3rd gear, replaced speed sensor and vacuum modulator. fluids good, no metal in pan and no codes.
  • 05camry33se05camry33se Member Posts: 67
    .....crickets.........
  • toolate2toolate2 Member Posts: 4
    I recently purchased a 2006 Toyota Avalon and can confirm that this vehicle has a major transmission hesitation design flaw which Toyota should be ashamed of. It is most noticeable in bumper to bumper traffic and makes driving hazardous. In suburban driving it is not that discernable but boy does it act up in traffic. My wife took the car to go downtown and on her return threw the keys at me and said she was not going to be the cause of an accident and I can keep the car for myself. (She is no shrinking violet and has driven in several major cities in the world including European capitals, Boston and LA – if you know what I mean!) I tested the vehicle and experienced the same alarming problem so I went out and bought her a much maligned domestic which is as smooth as can be in traffic – but I am stuck with the Avalon. I wish I had read these posts before buying – we unfortunately don’t have lemon laws in Canada where I now live. The problem in traffic is that the car does not coast when you take your foot of the gas pedal and then surges when you need to move ahead after the characteristic hesitation. Prospective purchasers please be forewarned and thoroughly test the vehicle to see if you can live with the problem depending in your driving needs.
  • pilot130pilot130 Member Posts: 319
    Sorry to hear about your dissatisfaction.
    Where do you live in Canada?
    You're correct that we don't have Lemon Laws as such, but there are other options which can be equally effective.
  • scoti1scoti1 Member Posts: 676
  • pilot130pilot130 Member Posts: 319
    That's one. There are others, depending on which Province the owner resides in. Hence the question "Where do you live."
  • fsmmcsifsmmcsi Member Posts: 792
    I made the mistake of buying a 2005 Sienna and experiencing severe neck and upper back pain before I discovered the cause - a design defect. The steering column is crooked / leans to the left, so if you hold the wheel with both hands, your shoulders & neck have to occilate in a wierd way as you turn it. I sold the heap after 4,500 miles and lost $8,440 doing so.

    People such as you and I are becoming more numerous. I have no desire whatsoever to own a Toyota anything.

    The competition is also not sitting still. While Toyota keeps being smug, they keep coming out with vehicles such as the new Buick Lucerne which has features the Avalon lacks.
  • toolate2toolate2 Member Posts: 4
    We live in Vancouver (British Columbia for our US friends) and with our congested inadequate road system, coupled with the rivers and mountains our traffic is as bad as most major North American cities. My wife is not just giving me a hard time by refusing to drive in heavy traffic - the Avalon has a problem. The other options that you allude too - is it litigation?
  • pilot130pilot130 Member Posts: 319
    Litigation is the last (and most expensive) option, altho' it is an option--at the end of the day it's your choice to make.
    Canvap is a very good choice. It's a Federally administered program which extends to all provinces. Your local Administrator for that program in the Lower Mainland area is the Better Business Bureau.
    Another option is the Motor Dealer Council in BC. This is an active agency which has proven to be very effective in resolving disputes between buyers and dealers.
    You might also wish to contact the BC's Ministry of Transportation. They also have a dispute resolution department which might be helpful to you.
    You don't mention taking any action at all with respect to your dealer or Toyota. Regardless of which agency you may decide to utilize, the first action you must take is to give an automaker ample opportunity to correct the problem.
    Also, 06 Avalons aren't getting a lot of press about hesitation issues. Yours may be an exception, and that may be a reason where the problem could be corrected by a dealer.
    That fact, and your insistence that Toyota has evidently designed in the problem across the board, coupled with the additional condemnation of Vancouver as congested, inadequate, etc., leads me to believe you may not be an easy person to please on many issues.
    My family and I lived in BC for a dozen years. In our opinion Vancouver is one of the nicest and most beautiful cities in North America. We go back there often and compared to Toronto and many other big cities, Van. is a delight to drive in. If all else fails, stop for a break at Stanley Park and take a walk around the Seawall. Or spend some time at UBC's Museum of Anthropology. Not many cities anywhere offer all the outstanding venues available in Van.
    I also think the Avalon is a darn good automobile.
    If, as you say, there is a hesitation issue with yours, It certainly isn't a widespread characteristic. Every one of the consumer polls I've seen are quite positive about the Marque.
    Perhaps it could be argued that you're being a excessively harsh in your assessment?
  • jbolltjbollt Member Posts: 736
    December's issue of Motor Trend has an article on "Family Values" where they compare The Camry, Accord, Sonata and Fusion. On pages 147-148, they state of the Camry: "At low speeds, it's five-speed automatic lurched on downshifts."

    No mention of hesitation, but many posts here have noted the lurching, or something similar.

    I have not always agreed with Motor Trend's evaluations, (Chevy Vega, AMC Pacer as Cars of the year, to name just two famous blunders...anyone remember those?) While I never stated that I doubted anyone who experienced these hesitations and lurches, I DID state that I didn't believe that it affected all Toyota/Lexus 5spd automatic dbw vehicles. I know believe somewhat differently. And I did wonder...Was it going to show up in my car at some point? To date, 30,000 miles NO! (Thank goodness)

    A poster questioned why those of us who don't experience these hestitations or lurches are on this forum...For me, It is to stay in the loop on updates (TSBs) fixes, and a general interest in all things automotive...and I own one (or more) of the subject vehicles. YES, I am also concerned mildly about resale values, as I tend to trade vehicles at roughly 2 year intervals...altho, I doubt (maybe hope?) this will make any significant dent in values.

    I am 99% satisfied with my 05 Highlander's transmission's performance. Perhaps the way I drive, under the conditions I drive...luck? dunno

    My conclusion for today..(sorry for being so wordy) ...it exists in all Toyota/Lexus 5 speed dbw configurations to some degree. The driving style, driving habits and traffic conditions coupled with the degree severity of the hesitation, (for lack of better terms at the moment, what I mean is some cars may exhibit more and others less) may or may not cause this to be an issue for any individual owner. I now suspect, that if any of you who have experienced the severist of the hesitations (and are sensitive to it) were to drive my vehicle, you would sense (or cause to happen) some degree of hesitation/lurch in my vehicle as well.

    I remain very satisfied with my Highlander, and have no reason to fool with that satisfaction, so until there is a 100% fix that will guarantee no degrading of the way it performs for me now, it is status-quo for me.

    For those who are unhappy, I truely hope there is a real fix in the offing.

    Respectfully,

    Jeff
  • scoti1scoti1 Member Posts: 676
    I agree with your assessment, particularly that all the subject cars have it to some degree, just some more severe and noticeable than others. I think in most it is not an issue because the hesitation is so slight it is not discernible.

    BTW, I may be confusing you with someone else, but I thought you just bought your Highlander. You put on some major miles if you are already at 30,000 mi.! If you aren't feeling the hesitation now, I think you are probably in the clear.
  • jbolltjbollt Member Posts: 736
    scoti...OOPS! You are right! 10,000 miles on my 05 Highlander, (bought in March 05) 30,000 miles on my 03 Highlander, and 35,000 miles on our 03 Camry SE dbw.....it's early in the AM LOL

    Jeff
  • scoti1scoti1 Member Posts: 676
    I don't think you are being too harsh in your assessment, contrary to the opinion of others. It is quite obvious that this is a major problem in some vehicles and you are one of the unfortunates stuck with a lemon. :lemon: It is obvious that the hesitation is not discernible or a problem in many of the vehicles sold but that is absolutely no consolation or help to you.

    Toyota has come up with some TSB's and a fix, but the jury is still out - some have reported improvement after the fix, others have not. In the Pittsburgh paper's announcement of the fix earlier this year, even the Toyota rep who was interviewed admitted that the fix wouldn't work for everyone. Good luck to you. I hope you find some recourse.
  • 1jmonty1jmonty Member Posts: 7
    With all due respect, isn't it a bit early in the game for someone to be waving the lemon flag? Anyone pulls that trigger that quick must have a real dislike for Toyota.Do you have a major issue with the big T??
  • wwestwwest Member Posts: 10,706
    With all due respect back at you....

    Only a little research would convince you that ALL Toyota/Lexus 5-speed transaxle, FWD, vehicles are showing a high percentage of owners with engine/throttle hesitation complaints going all the way back to the 2002 model year first addressed by a TSB in the spring of 2003.
  • 1jmonty1jmonty Member Posts: 7
    With all due respect back at you also, Can you show any hard data to back up your profound statement that "ALL T/L transaxle FWD vehicles are showing a HIGH percentage of owners----" Where can I go to find this high percentage, what exactly is the number, and data like that, or are you just firing for effect? Being a Missouri native, I'm a show me kind of guy. Personally, I think you may be blowing a little smoke there.
  • dino01dino01 Member Posts: 26
    Why don't you call Toyota and ask? Everytime I called they act like I am the only one with the problem and they have never heard such thing. This is the same with all the dealer.
  • wwestwwest Member Posts: 10,706
    Hey, if you don't want to believe me, or take the time to do a little "googling" yourself, then don't.
  • 1jmonty1jmonty Member Posts: 7
    Well you're right about one thing for sure. I definitely don't believe your statement. It just isn't true dude, Google or no Google.
  • scoti1scoti1 Member Posts: 676
    :lemon:
    :lemon:
    :lemon:

    Get over it. Calling it a lemon is actually a little less harsh than calling it a "design flaw" imho (which would imply every vehicle is noticably afflicted with this symptom).
  • wwestwwest Member Posts: 10,706
    Well, since it is so widespread(***) IMMHO it really is a design flaw. But like I had to do back in 92 with my new LS400, even knowing EVERY vehicle was affected, an individual can only pursue the issue under the lemon law.

    *** by widespread I only mean a significantly large enough number of owners willing to complain to make the matter very well known publicly.

    Is that less than 1% or greater than 10%??
  • mert2mert2 Member Posts: 74
    Jeff-

    Interesting. I doubt the problem will show up if it hasn't already, knock on wood. Thanks for an honest, upfront post, with no hint of mocking or discounting those of us who experience this truly aggravating symptom.
  • mert2mert2 Member Posts: 74
    User: 1jmonty
    Email: private
    Member since: October 29, 2005
    Last login on: November 10, 2005

    Just another new member joins to tell us we don't have a problem? What a coincidence.
  • mert2mert2 Member Posts: 74
    I hit the 5K mark, time for maintenance and getting the TSB performed.

    Anybody have this done that can tell me what to look out for?
  • 1jmonty1jmonty Member Posts: 7
    So what does anyone's new membership have anything to do with what was said about that statement. You were a new member once too. I spoke my mind because his statement just isn't true. He even admits it for gosh sakes. At least I didn't lie, cheat or make sly remarks about someone's membership date or it being some kind of coincidence, whatever that is supposed to mean. If you disagree with my opinion, just have the guts to say so instead of making some kind of left handed slam about why what or how I said it. Or is it just too diificult to be honest.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Actually I don't believe there is such a thing as a total "lemon". In practically every case of a "lemon", what you literally have in front of you, is a car that is 99% good and 1% bad and which nobody knows how to fix in a given moment of time and in a given place. "Lemon" strikes me as too inflationary a statement about a complex piece of machinery.

    Saying "a design flaw in one component" is actually a lot more accurate IMHO. It's a more sober word than "lemon" I think, the later being purely emotional (even if justifiably so).
  • pilot130pilot130 Member Posts: 319
    First the bad News. It's getting a little out of hand folks.
    Now the good news. Evidently, this time I'm not the bad guy.
    To Scoti. Not trying to put anyone or anyone's case down in my post earlier, but it did seem like his assesment was slightly on the harsh side, based on what little info was posted at the time. I thought most of what I posted was helpful.
    To Wwest. Your blanket condemnation does appear to be somewhat excessive. I don't think you meant it to be as across the board as it sounded. However I respect your opinion if that's what it was. But I don't agree with it either.
    To Mert. What exactly is your point in posting the guy's profile? Didn't seem to me that he was saying no one is having problems. Maybe you were just trying to get someone's goat? It does nothing but fan the flames, friend.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    NOT implying anyone here would do this, but for future reference:

    if you use two identities and we catch you, you are out of here. Dem's the rules and we have the technology :P
  • pilot130pilot130 Member Posts: 319
    Couldn't be more pleased to hear it Mr.Shiftright. It could be argued that something like that is long overdue.
  • wwestwwest Member Posts: 10,706
    All of the component tolerances, absolutely by pure happenstance, fall outside of the norm in the same "direction".

    Can happen with any and every product, and does, even my company's.

    But here I think we have an extreme case, too many of Toyota/Lexus' 5-speed transaxle products are falling outside the "norm".

    Personally I keep thinking about the transaxle's PWM (pulse width modulated) pressure regulating solenoid as being the most probable culprit. I just can't imagine using this device in this manner without some sort of pressure measuring feedback or factory calibration of the positional charactoristics of each solenoid individually.

    But then the factory may be doing exactly that but the positional charactoristics are changing over time for some unknown reason.

    The good news is that the problem, seemingly, doesn't exist in the 06 models but with a reduced EPA rating of ~1 MPG.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    Given the modern machining methods of today, I don't think you'd even notice if a car had excess tolerances in opposite directions. It's not, after all, the Space Shuttle....you're allowed a few hundred thousands here and there :P

    I will qualify my statement---when the workers at BMC and Harley DAvidson were sabotaging the products on the assembly line, then maybe yes you'd have a real lemon---but that was purposeful destruction (sometimes they'd leave a gear out of the transmission or leave bolts out here and there.
  • scoti1scoti1 Member Posts: 676
    By suggesting toolate2 has a lemon, I thought I was being diplomatic. A lemon, to me, suggests a mistake in one vehicle. I personally would have to lean to the "design flaw" side, but can you win a lemon law case if it is an inherent design flaw?
  • wwestwwest Member Posts: 10,706
    I was thinking more along the line of electronic components. Engineers design a product using resistors that have a +/- tolerance of 5%, say, with absolutely no expectation that one time out of a million all of the resisters in one individual product will end up on the maximum + side of the tolerance.

    That makes a LEMON.

    In this case maybe the MAF, the IAT, and both of the "front" oxygen sensors all end up on the end of the tolerance that causes the vehicle to always run rich and thus be less subject to knock/ping. Remaining, or upshifting, into higher gears would be then more "acceptable".
  • wwestwwest Member Posts: 10,706
    Most manufacturers would much rather oppose a few lemon law actions than admit a design flaw. Certainly not likely to make an admission of a design flaw to oppose a lemon law proceeding.
  • scoti1scoti1 Member Posts: 676
    They didn't call it a flaw, but in bkinblk's arbitration case, I recall bkinblk saying that Toyota claimed that the hesitation was part of the design and this is the basis that he lost his case. Maybe I am wrong. Too lazy to go look up his posts right now. I read of another hesitation case (I believe it was somewhere here on Edmunds) where the owner also lost because it was inherent to the design and therefore not technically a lemon. I'll try to research those when I have more time.
  • Mr_ShiftrightMr_Shiftright Member Posts: 64,481
    You missed my point I think. Your resistor has but one function so if it's mis-made it doesn't work. A Lexus SUV does hundreds of different things and only one function isn't working. Big diff and that's why the entire car can't be a "lemon". One part has lemonosity, not the entire structure.
  • splatsterhoundsplatsterhound Member Posts: 149
    My father has a highlander (new). The thing has terrible hesitation and he's never gotten an answer from Toyota or the dealer other than a vague "we'll, bring it in and we'll take a look at it..." When they do 'look' at it, they say it's fine. It's a crumby design then :lemon:
  • user777user777 Member Posts: 3,341
    respectfully disagree on this one shifty... "lemonosity"? hmmm.

    let's say the vehicle is 99% operating properly, but since delivery or shortly following delivery, 1% is not functioning properly. let's say that this 1% causes distraction from the main task of driving, dis-sastisfaction, an owner to feel unsafe in some driving scenarios, frustration because the dealer says everything is normal...attempts at a solution are stone-walled or unsuccessful. other people with the vehicle simply don't have the problem. lemon is an unfair label?

    "lemonosity"?

    shifty - exactly what % of a vehicle has to fail to operate properly to be a labeled a lemon? 1%, 10%, 25%, 50%?

    does it have something to do with severity, or time in the shop, or fixability?

    what if 100 things go wrong with a vehicle but those 100 things are fixed promptly and competently at a dealer when the vehicle is brought in? you know chronically in the shop, fixable, but taking up an owner's effort and time? "lemonosity" or lemon?

    your criteria is subjective. some might say, as subjective as the hesitation problem itself. for the people with the problem, it's not subjective, it's objective...it's just not backed up with captured and comparative data and a detailed understanding of the design of the system and it's proper operation.

    i believe 100% in reports that some people with these model vehicles have absolutely no problem (not just that they don't percieve a problem), and some population (size unknown) has an issue but the owners don't deem it significant or don't notice it (perhaps because of driving style - we don't know), and some population (size unknown) has a significant problem.

    one might imagine this situation is possible, not because of a design flaw (although the driver classification algorithms are possibly contributing), but i believe because of some part or parts failing to meet specifications (as wwest indicated)...this happens, or because the sub-system was not put together properly...this happens too.

    by characterizing it as one part exhibiting "lemonosity" is to (perhaps unconsciously) invalidate and marginalize the reports of these owners. i'm sure it's not your intent.

    rather than split hairs on the labeling of a vehicle in it's entirety based on the performance of the transmission or engine, or whatever parts are involved, i personally think we should be collectively sponsoring the purchase of an OBD-II reader capable of interfacing to a laptop to capture this phenomenon in gory detail so we can pick it apart and speak to it using understandable language for everyone...
  • scoti1scoti1 Member Posts: 676
    I found this post regarding lost arbitration because it is a design "characteristic" (aka flaw/lemon/whatever to others)

    leighanne4, "Toyota Highlander Owners: Problems & Solutions" #1914, 27 Oct 2004 10:48 pm

    leighanne4, "Toyota Highlander Owners: Problems & Solutions" #1943, 4 Nov 2004 10:12 pm
This discussion has been closed.