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Revs dropping and cutting out

Discussion in 'A3/S3 Forum (8L Chassis)' started by Andrew@A.L.D, Nov 27, 2010.

  1. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Nov 27, 2010]
    Just started doing this, maybe its the cold but its getting annoying.

    I'll be driving down the road and come to a junction, dip the clutch and the revs drop to 400 then come back to 950rpm, some times it will cut out?
    #1
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  3. HTC
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    HTC Active Member

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    [Nov 27, 2010]
    Last time this happened to me it was a vacuum leak. Take a look at the various vacuum pipes post turbo. Also a clean up of the throttle body can cure this.
    #2
  4. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Nov 27, 2010]
    Thought i had a vac leak and my MPG has been bad
    #3
  5. Alex C
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    Alex C Well-Known Member

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    [Nov 27, 2010]
    can a vac leak ruin your mpg?
    #4
  6. finesse
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    finesse Active Member VCDS Map User

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    [Nov 27, 2010]
    hmm sounds like my crank sensor issue, vagcom scan will confirm
    #5
  7. Lemon S3
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    Lemon S3 Alex

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    [Nov 27, 2010]
    It's probably the vac pipe under the inlet manifold.
    #6
  8. Broken Byzan
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    Broken Byzan Photographic Moderator Staff Member Moderator VCDS Map User

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    [Nov 27, 2010]
    I had this recently, went through all of the above, turned out to be the MAF.
    #7
  9. Andrew@A.L.D
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    Andrew@A.L.D Cylinder Head Master

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    [Nov 27, 2010]
    Had a new maf fitted
    #8
  10. Sandip
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    Sandip Well-Known Member

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    [Nov 27, 2010]
    Clutch switch? Not had an issue with this switch personally but i've heard the odd story about them lol

    I would of thought it was the MAF to be honest, possibly try unplugging it and see if it still does it
    #9

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