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Boost dropping off?

Discussion in 'A4/S4 forum(B5 Chassis)' started by Oranoco, Mar 20, 2008.

  1. Oranoco
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    Oranoco Well-Known Member

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    [Mar 20, 2008]
    I've found when giving my A4 a bit of right foot the boost peaks at about 0.8bar and once in 2nd and third tails right back to 0.4. Soggy wastegate actuator perhaps?

    If it was one of my old Fords that's the route I'd take but the Audi has the N75 valve to control things so don't want to go swapping bits out without being sure.
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  3. Blue_Thunder
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    Blue_Thunder Active Member

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    [Mar 20, 2008]
    Sounds like a boost leak.
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  4. AUDI TURBO
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    AUDI TURBO Member

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    [Mar 21, 2008]
    check dump vlave and pipe etc i had VERY simalr problem with my 14 when first got it after replacing pipes, clips, dumpvlave, odd gaskets replaced ht 8psi and held like it should
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