VW Jetta MKIV/MK4: Car Jerks When Shifting |Volkswagen Bora
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Thread: Car Jerks When Shifting

  1. #1

    Question Car Jerks When Shifting

    Hello, new member here. I actually have a 2003 GTI VR6 with the 6-speed manual, not a Jetta, but I saw the quality of answers in this forum so I posted here. This problem started a few months ago:

    As I accelerate, when I depress the clutch pedal to upshift and I lift my foot OFF the gas, the engine RPMs do not immediately drop. Instead it takes about a second for the RPMs to stop climbing after I depress the clutch pedal. Therefore when I shift to the next gear and release the clutch again, the car jerks as the engine RPMs decrease rather abruptly.

    Before this problem started, when I depressed the clutch, the engine RPMs begin to drop the instant I press the clutch pedal in, as is the case with all other manual transmission cars I've owned. I suspected this was a clutch issue, and since I have 113K miles on the car, I just had the clutch and timing chain replaced this week. However the issue persists. I had the throttle-body cleaned as well, but no luck either.

    What would cause this problem? Is something wrong with the throttle-body? The mass-air meter? The computer? The intake? It's almost as if something is still giving the car gas for another second or so, AFTER I take my foot off the accelerator. This is very annoying, especially when I have passengers in the car, they assume I can't drive a stick which is not the case. And I'm sure the jerking can't be good for the transmission and suspension.

    Any help would be appreciated.

  2. #2

    Default Re: Car Jerks When Shifting

    Is this at WOT or just cruising around?

  3. #3

    Default Re: Car Jerks When Shifting

    Quote Originally Posted by ForceFed4g63 View Post
    Is this at WOT or just cruising around?
    Both. WOT is worse because the RPMs tend to be higher, I shift faster, and hence the jerk is more dramatic. At least with cruising, I have the option of releasing the clutch pedal very slowly to avoid the issue. But that will decrease clutch life.

  4. #4

    Default Re: Car Jerks When Shifting

    bump

  5. #5

    Default Re: Car Jerks When Shifting

    I would try a reflash or having your battery unplugged for an hour or so to try and reset things... Sometimes rev hang is an ECU issue, sometimes it can be due to other things.. A video would definitely help too if you can get one.

    Do you feel a jerk or significant movement of the engine when you lift off the accelerator w/o depressing the clutch?
    Quote Originally Posted by darksidedub View Post
    come on dude really? most states in this country dont require a front plate. some states dont require an inspection sticker. new york just wants our money. i may as well leave the house with my pants down so i can make it a lil easier for this state to f**k me in the a$$.
    Quote Originally Posted by Vixen View Post
    I will fight you.

  6. #6
    2000 Jetta GLX mtglading is on a distinguished road mtglading's Avatar
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    Default Re: Car Jerks When Shifting

    my guess is your clutch is bad. does your cars rpm rev high when you hit the gas, then bog back down? sounds like the clutch is gone and its not catching fast enough, so when you shift it grinds into gear. at least thats what im getting from what you wrote. try revving high in a lower gear, then hit the clutch, then gas hard. if the rpm spikes, then you need a clutch.

    little tip, before you can get a new one (if you do need one), try rev matching your gears. you can shift without a clutch without grinding. i wouldnt try it in first to second, but the other gear you can do. rev to like 3500 rpm in 2nd or 3rd, then shift to neutral without using the clutch. pause just a split second in neutral, then push it into the next gear. if you do it right, it wont grind. you can also down shift, but its a lot harder. if you are in say 4th and want to go to 3rd, you will need to match the rpms. since downshifting causes rpms to rise, you need to compensate. go from 4th, slap it in neutral, than hit the gas while in neutral. rev it up like another 1000 rpm past what you were. so if 4th was 2500 rpm, go to 3500 rpm in neutral, then slap the stick into 3rd. its a bit harder, but you should be able to do it without grinding.

    this is also a lot of fun to just goof around with. its not great for your tranny, but if done right it will save your clutch, or postpone the need for a new one until you get it replaced.

    all that being said, i would check plugs, connections, maf (clean it), wires, and possibly exhaust/cat. sorry thats a lot to read. good luck though
    http://jettajunkie.com/vw-jetta/show...1.html?p=59477

    Quote Originally Posted by OregonDweller View Post
    Well if you didnt have a damn baby on your wheels maybe i could tell what they are! lol

  7. #7
    2000 Jetta GLX mtglading is on a distinguished road mtglading's Avatar
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    Default Re: Car Jerks When Shifting

    ooo, almost forgot, your dogbone mount might be bad too. if you dont have a new one, get it! well worth the $35 and hour to install (on the long side).
    http://jettajunkie.com/vw-jetta/show...1.html?p=59477

    Quote Originally Posted by OregonDweller View Post
    Well if you didnt have a damn baby on your wheels maybe i could tell what they are! lol

  8. #8

    Default Re: Car Jerks When Shifting

    He said he just got a new clutch dude lol.

    Doesn't mean its not smoked... You're not really supposed to boost on a new clutch. You're supposed to drive it like a granny for the first 5k or so. But it doesn't sound like a clutch IMO.
    Quote Originally Posted by darksidedub View Post
    come on dude really? most states in this country dont require a front plate. some states dont require an inspection sticker. new york just wants our money. i may as well leave the house with my pants down so i can make it a lil easier for this state to f**k me in the a$$.
    Quote Originally Posted by Vixen View Post
    I will fight you.

  9. #9
    2000 Jetta GLX mtglading is on a distinguished road mtglading's Avatar
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    Default Re: Car Jerks When Shifting

    my bad. skipped over that. haha. im tired!
    http://jettajunkie.com/vw-jetta/show...1.html?p=59477

    Quote Originally Posted by OregonDweller View Post
    Well if you didnt have a damn baby on your wheels maybe i could tell what they are! lol

  10. #10

    Default Re: Car Jerks When Shifting

    Quote Originally Posted by Boost Addicted View Post
    I would try a reflash or having your battery unplugged for an hour or so to try and reset things... Sometimes rev hang is an ECU issue, sometimes it can be due to other things.. A video would definitely help too if you can get one.

    Do you feel a jerk or significant movement of the engine when you lift off the accelerator w/o depressing the clutch?
    My mechanic just suggested this also since I posted this thread. He something about "resetting the throttle body", which he will do at no charge. I'll be out of town for the next week. When I get back I will let you guys know if this fixed it.

  11. #11

    Default Re: Car Jerks When Shifting

    Yup, TBA (throttle body allignment), also accomplished by an ECU flash or batt unplug..But using a scan tool is the easiest, most efficient way. This may be the case.. Keep us updated!
    Quote Originally Posted by darksidedub View Post
    come on dude really? most states in this country dont require a front plate. some states dont require an inspection sticker. new york just wants our money. i may as well leave the house with my pants down so i can make it a lil easier for this state to f**k me in the a$$.
    Quote Originally Posted by Vixen View Post
    I will fight you.

  12. #12
    G&M Performance canucme3 is on a distinguished road canucme3's Avatar
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    Default Re: Car Jerks When Shifting

    Quote Originally Posted by Boost Addicted View Post
    He said he just got a new clutch dude lol.

    Doesn't mean its not smoked... You're not really supposed to boost on a new clutch. You're supposed to drive it like a granny for the first 5k or so. But it doesn't sound like a clutch IMO.
    5k?!?! Everyone I've talked to has said about 500.
    but yea it doesn't really sound like you glazzed the clutch. Definitely don't push it hard for at least a couple hundred miles or you will end up glazzing it.

    Just another thought. It could be the clutch pedal sensor/switch. People complain about their RPM's hanging when it goes bad. Just pull the sensor and check that. Takes 5mins and can't really hurt anything
    .:G&M Performance:. MBC for sale Facebook
    Quote Originally Posted by Vixen View Post
    Why do that when you could S my D?

  13. #13

    Default Re: Car Jerks When Shifting

    Quote Originally Posted by canucme3 View Post
    5k?!?! Everyone I've talked to has said about 500.

    Just another thought. It could be the clutch pedal sensor/switch. People complain about their RPM's hanging when it goes bad. Just pull the sensor and check that. Takes 5mins and can't really hurt anything
    True, most clutch manufacturers recommend 750-1000 mile break in, but I call it safe and wait until one oil change later. I've watched a friend of mine totally glaze his new clutch over after 2000 miles of driving like a granny... Coulda been a faulty clutch or warped flywheel for all I know, but when I spend 700bux in hardware, I want it to last lol.
    Quote Originally Posted by darksidedub View Post
    come on dude really? most states in this country dont require a front plate. some states dont require an inspection sticker. new york just wants our money. i may as well leave the house with my pants down so i can make it a lil easier for this state to f**k me in the a$$.
    Quote Originally Posted by Vixen View Post
    I will fight you.

  14. #14
    G&M Performance canucme3 is on a distinguished road canucme3's Avatar
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    Default Re: Car Jerks When Shifting

    Quote Originally Posted by Boost Addicted View Post
    True, most clutch manufacturers recommend 750-1000 mile break in, but I call it safe and wait until one oil change later. I've watched a friend of mine totally glaze his new clutch over after 2000 miles of driving like a granny... Coulda been a faulty clutch or warped flywheel for all I know, but when I spend 700bux in hardware, I want it to last lol.
    Oh yea I understand. I just saw 5k and was like wtf . After 2k and still glazed?! There must have been something else goin on that caused it.
    I still don't think thats what is happening to OP. I'm putting my money on the clutch pedal senor.
    Could also be a lagging throttle control sensor, but you would have noticed it lagging while you were accelerating.
    .:G&M Performance:. MBC for sale Facebook
    Quote Originally Posted by Vixen View Post
    Why do that when you could S my D?

  15. #15

    Default Re: Car Jerks When Shifting

    Quote Originally Posted by canucme3 View Post
    Oh yea I understand. I just saw 5k and was like wtf . After 2k and still glazed?! There must have been something else goin on that caused it.
    I still don't think thats what is happening to OP. I'm putting my money on the clutch pedal senor.
    Could also be a lagging throttle control sensor, but you would have noticed it lagging while you were accelerating.

    Guess we'll know in a week lol. Might be neither too...
    Quote Originally Posted by darksidedub View Post
    come on dude really? most states in this country dont require a front plate. some states dont require an inspection sticker. new york just wants our money. i may as well leave the house with my pants down so i can make it a lil easier for this state to f**k me in the a$$.
    Quote Originally Posted by Vixen View Post
    I will fight you.

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