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dipping revs

Discussion in 'Classic Audi Forum' started by Corne, Jul 23, 2006.

  1. Corne
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    Corne New Member

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    [Jul 23, 2006]
    Hi

    My Audi's revs dips when I take off the oil filler cap, is that normal or not, she doesn't stall or anything, the revs just dips a bit and stay there. Is that ok or not?
    Corne:(
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  3. scotty33
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    scotty33 Member

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    [Jul 23, 2006]
    Yes that is normal. The crankcase breather system is connected into the intake, when you open the oil filler, you are letting in unmetered air through the breather system.
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  4. 5potnoodle
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    5potnoodle New Member

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    [Jul 23, 2006]
    You don't say what engine you have there... :)

    My 5pot 1B engine stalls when I do that (and my NF before that), it's a good check to see if you have any vacuum leaks... or so I've been told anyway. If it doesn't stall there may be a leak elsewhere.
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  5. Corne
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    Corne New Member

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    [Jul 26, 2006]

    Hi, sorry for takin so long to write back, I have an AAH engine 2.8 V6, Thanks for the help.
    Corne
    #4

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