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S4 2.7 PROBLEM!!!

Discussion in 'A4/S4 forum(B5 Chassis)' started by MUSSIE2007, Dec 22, 2007.

  1. MUSSIE2007
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    MUSSIE2007 New Member

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    Hi all my 2.7 Bi turbo smells strongly of petrol when running, think its overfuelling but not sure why. No leaks or smells under bonnet and no smoke from exhaust, but exhaust emmissions smell like you're in a refinary!!
    any suggestions? cheers.
    #1
  2. Siena
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    Siena Active Member

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    Most common culprits are MAF, Lambda Sond or coolant temp sensor.

    Easiest way to find out is to get fault codes pulled.
    #2
  3. Siena
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    Siena Active Member

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    If the smell's more like unburnt fuel, it could be a leaking / weeping union.
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