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Throttle problem, please help

Discussion in 'A3/S3 Forum (8L Chassis)' started by matt blowen, Jun 12, 2014.

  1. matt blowen
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    matt blowen Member

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    Right guys if searched all over but i cant find a definate solution, when driving steady in 1st & 2nd gear say if i lift off the gas pedal the car bucks and and also when i slightly press the throttle it bucks real pain when driving in stop/start traffic. Its asif it happens when the throttle plate closes any ideas thanks,
    #1
  2. matt blowen
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    matt blowen Member

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    I have quite a bit of side to side engine movement, would engine mounts be the main cause of my bucking?
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  3. LynxE
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    LynxE Member

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    Could it be the throttle body sticking?
    #3
  4. matt blowen
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    matt blowen Member

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    No buddy, cleaned and ive done alignment
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  5. s-express
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    s-express New Member

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    Try a new MAF first, then if its still happening, remove TB, split and clean up the tracks on the circuit board that the 5 contacts run over - they get a build up of carbon on them and this gives faulty resistance readings to the ecu.
    #5
  6. s-express
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    s-express New Member

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    off my mrs A2 but you get the idea - the black area is carbon deposits on the 4 tracks (not 5 as previously stated).
    #6
  7. matt blowen
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    matt blowen Member

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    I will try this, thanks
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  8. matt blowen
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    matt blowen Member

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    Do i have to remove the black cover thats on the TB?
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  9. s-express
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    s-express New Member

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  10. s-express
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    s-express New Member

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    yep you do
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  11. matt blowen
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    matt blowen Member

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    Thats wicked thanks will TB cleaner be ok on the tracks?
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  12. matt blowen
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    matt blowen Member

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    Mine looks different inside, it has a big spring and also a coil spring.
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  13. matt blowen
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    matt blowen Member

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    Ive got stuck in and found 2 small tracks, i have gave them a clean with cotton bud and wynns cleaner, i will report back in the motning with the results
    #13
  14. matt blowen
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    matt blowen Member

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    No change, at least ive learned someting new.
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  15. lol4fun
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    lol4fun Member

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    Mine does the same. Put a new engine mount on and no different. Possibly worn gearbox, bottom arms, drive shafts. Actually have you replaced or poly bushed the dog bone mount? That would cause similar issues and are known to wear out.
    #15
  16. matt blowen
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    matt blowen Member

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    Ive put on a yellow powerflex on the dogbone mount to try and sort this but i dont think it has helped, i might try and tighten the long bolt that compresses the bush? Ill take a look at the bottom arms in the morning
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  17. matt blowen
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    matt blowen Member

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    I dont know of its connected but when i rev the car, as the revs fall just past 2k you can feel the car misfire or bump a little and the exhaust note changes?
    #17
  18. 16Klappe
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    16Klappe Princess Slayer

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    Disconnect the MAF and try again.
    #18
  19. matt blowen
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    matt blowen Member

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    Ive treid running without the maf and it runs lumpy and then dies? I was told this is normal on an agu engine code
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  20. 16Klappe
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    16Klappe Princess Slayer

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    Yep. Totally normal.
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  21. matt blowen
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    matt blowen Member

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    *UPDATE* all sorted just changed my right side engine mount, and it drives spot on
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