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Starting/idle problems

Discussion in 'A3/S3 Forum (8L Chassis)' started by muzzyboy, Jul 4, 2009.

  1. muzzyboy
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    muzzyboy Member

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    [Jul 4, 2009]
    Been having a few problems over the last few weeks with the S3.

    It seems to be after lengthy motorway journeys only, if i turn the car car off and go back to it say 15/30/60/120 mins later it'll fire up and the revs will drop so far that it cuts out. Once i restart it, it'll usually fire up ok the 2nd time but the idle is like a pile of ****, up and down unless i give it a bit of throttle and it seems ok. It also has started takin a bit longer for the engine to fire up once ive turned the key although this doesnt happem all of the time.

    Short journeys, it seems ok for some reason.

    Any help would be greatly appreciated.
    #1
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  3. muzzyboy
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    muzzyboy Member

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  4. 1.8twes
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    1.8twes New Member

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    [Jul 6, 2009]
    Hi if I were you i'd check/change all four sparkplugs if this hasn't been done for a while and then take off and clean your throttle body with some carb cleaner, you'll be suprised at the amount of carbon and **** in there.

    When my revs were hunting up and down I cleaned the throttle body and the problem was fixed.
    #3
  5. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Jul 6, 2009]
    Need to clean my TB to sought out a similar problem.
    1.8twes did you use vag com to reset your TB?
    #4
  6. 1.8twes
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    1.8twes New Member

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    [Jul 6, 2009]
    No- after cleaning TB and putting it back together, turn the iginition on but dont start the car, you'll hear the throttle body realigning itself, leave it for five minutes and then start the car.
    It takes the ECU a couples miles of driving to sort itself out but you'll notice a big difference straight away.
    #5
  7. IIIadidasboy
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    IIIadidasboy Member

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    [Jul 7, 2009]
    Could it be heat related? MAF maybe?
    #6
  8. ash_pearce
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    ash_pearce Member VCDS Map User

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    [Jul 7, 2009]
    could be a dodgy fuel pressure reg
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  9. muzzyboy
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    muzzyboy Member

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    [Jul 7, 2009]
    Cheers guys!

    Getting it looked at next week so will post up the results!

    Paul.
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