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Shaking in idle

  • 11-07-2008 7:46am
    #1
    mcmc
    Closed Accounts Posts: 128 ✭✭


    Hi all,

    I have noticed my car is shaking alot when sitting at lights or in traffic. It does not matter if its in gear or not.

    Its an 02 audi a4. Anybody know what might be causing this?


Comments

  • #2
    minxie
    Registered Users, Registered Users 2 Posts: 4,064 ✭✭✭minxie


    mcmc wrote: »
    Hi all,

    I have noticed my car is shaking alot when sitting at lights or in traffic. It does not matter if its in gear or not.

    Its an 02 audi a4. Anybody know what might be causing this?


    "dual mass flywheel failure"


  • #3
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    minxie1 wrote: »
    "dual mass flywheel failure"

    :eek:Dont like the sound of that!!

    Is there any other tell tale signs that thats what the problem is?
    Thanks for the speedy reply:)


  • #4
    Ferris
    Registered Users, Registered Users 2 Posts: 2,290 ✭✭✭Ferris


    Is it a diesel? If so dual mass flywheel failures are quite common on the 1.9tdi.


  • #5
    quarryman
    Registered Users, Registered Users 2 Posts: 7,496 ✭✭✭quarryman


    There are a lot of things that can cause this.

    Have a look through these posts:

    http://www.audiforums.com/searchpro.asp?phrase=rough+idle&author=&forumid=ALL&topicreply=both&message=subject&timeframe=%3E&timefilter=0&language=single&top=300&criteria=AND&minRank=0&sortMethod=r&submitbutton=+OK+


  • #6
    furtzy
    Closed Accounts Posts: 1,464 ✭✭✭furtzy


    minxie1 wrote: »
    "dual mass flywheel failure"

    This is more characterised by a vibration and noise in the clutch when depressed. Just replaced mine in the Vectra. Its a very common problem across all manufacturers and not just in diesels.

    Hope its not the problem as you're looking at over €1k to fix as it involves an entire new clutch assembly which in tirn requires gear box removal.


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  • #7
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    Ferris wrote: »
    Is it a diesel? If so dual mass flywheel failures are quite common on the 1.9tdi.

    Yep she is a diesel 1.9 tdi.


  • #8
    Toon--soldier
    Registered Users, Registered Users 2 Posts: 206 ✭✭Toon--soldier


    whats the rpm when its at idle? it might just be running lean


  • #9
    furtzy
    Closed Accounts Posts: 1,464 ✭✭✭furtzy


    mcmc wrote: »
    Yep she is a diesel 1.9 tdi.

    Depress the clutch to the normal biting point and hold it there. If its the flywheel you will hear a rattling grinding noise.


  • #10
    Dubdude
    Registered Users, Registered Users 2 Posts: 508 ✭✭✭Dubdude


    I dont know much about cars but I had this similar prob wit my golf my mate is a mechanic and i was telling him about this as we wer talking, he told me that there is just dirt in some part of the engine he opened up my bonnet and start spraying some stuff into the part that needed to be cleaned as my other mate kept reving the engine


  • #11
    stevenmu
    Moderators, Society & Culture Moderators Posts: 9,689 Mod ✭✭✭✭stevenmu


    Probably the throttle body, was it a tube/valve under the air filter box?

    AFAIK (not a mechanic) that wouldn't cause the car to vibrate on it's own, what it can cause though is the car to idle roughly, the RPMs will jump up and down, which in turn will lead to different amounts of normal vibration coming through the car.


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  • #12
    [Deleted User]
    Posts: 0 ✭ [Deleted User]


    Toon--soldier wrote: »
    whats the rpm when its at idle? it might just be running lean

    It's diesel so yeah, probably is :-)


  • #13
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    Toon--soldier wrote: »
    whats the rpm when its at idle? it might just be running lean


    8 - 900 rpm when idle. There is no jumps or drops in it.


  • #14
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    furtzy wrote: »
    Depress the clutch to the normal biting point and hold it there. If its the flywheel you will hear a rattling grinding noise.

    Ill try that later and let you know how i get on. Fingers crossed its not that.

    Im just thinking, i got the car fully serviced and a timing belt done on it about 3 weeks ago from an audi dealership. If it is the flywheel should they not have seen that it was about to go?

    Thanks for all the replys.


  • #15
    furtzy
    Closed Accounts Posts: 1,464 ✭✭✭furtzy


    mcmc wrote: »
    Ill try that later and let you know how i get on. Fingers crossed its not that.

    Im just thinking, i got the car fully serviced and a timing belt done on it about 3 weeks ago from an audi dealership. If it is the flywheel should they not have seen that it was about to go?

    Thanks for all the replys.

    They wouldn't have noticed it without driving it. It wouldn't be apparent in a visual inspection as the components wouldn't be seen unless the clutch was disassembled. Hope its not the flywheel.

    Whats the mileage on the car? If its below average there may be some good will from Audi possibly a percentage of labour etc. It is a known fault afer all


  • #16
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    furtzy wrote: »
    They wouldn't have noticed it without driving it. It wouldn't be apparent in a visual inspection as the components wouldn't be seen unless the clutch was disassembled. Hope its not the flywheel.

    Whats the mileage on the car? If its below average there may be some good will from Audi possibly a percentage of labour etc. It is a known fault afer all


    Just shy of 94k:o


  • #17
    furtzy
    Closed Accounts Posts: 1,464 ✭✭✭furtzy


    mcmc wrote: »
    Just shy of 94k:o


    Eh o.k....no goodwill on that one :)

    Hopefully its not the flywheel then...


  • #18
    mcmc
    Closed Accounts Posts: 128 ✭✭mcmc


    Just tried that clutch thing and there was no sound from it:).

    I was reading about maybe there might be a crack in one of the pipes that is sucking in air. Any ideas about how to try find this hole?

    Thanks again.


  • #19
    minxie
    Registered Users, Registered Users 2 Posts: 4,064 ✭✭✭minxie


    this might help,
    http://www.vwaudiforum.co.uk/forum/showthread.php?t=29445
    had similar problem (ahem) :mad: still have even after forking out nearly 1 k on replacing a flywheel on my mark 4 golf tdi only for the noise to come back within 2 weeks.... am personaly at my wits end myself, other possibilities that were mentioned to me were gearbox bearing,or clutch release bearing.
    am gonna try mine on a vagcom and see what fault codes come up!!! mine was still under warranty but garage wouldnt cover (some suprise)
    its hard to get someone to say for certain what it is, any bright buttons out there????


  • #20
    mickdw
    Registered Users, Registered Users 2 Posts: 23,688 ✭✭✭✭mickdw


    mcmc wrote: »
    Hi all,

    I have noticed my car is shaking alot when sitting at lights or in traffic. It does not matter if its in gear or not.

    Its an 02 audi a4. Anybody know what might be causing this?

    Something totally different here. I had an Audi 80 a few years ago. It started this shaking while idling one day while was caused by a very very slight irregularity in the idle. Didnt bother fixing as it was an old car. One week later - Total loss of brake servo (which basically gave me no brakes) due to a split in a vacuum hose at the servo. So fixed the brake hose and no more shaking. \it had been leaking for a while causing the poor running. This type of system is common to most cars and would certainly be worth a check if the usual suspects dont cure it. i.e. cracked intake pipework, airflow meter. Fault with those two things usually cause the revs to go up and down alot though.


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