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Boost leak test, DV leaking???

Discussion in 'A3/S3 Forum (8L Chassis)' started by kirkmiles, Apr 26, 2013.

  1. kirkmiles
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    kirkmiles New Member

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    [Apr 26, 2013]
    Having some running issues with my car at the moment, first boost leak test i did showed no leaks. I tested from the maf right through. Today i thought i would try a test from the turbo outlet hose to the TB. I removed my DV from the tip. I have two DV's a forge and a bailey. With the forge one fitted soon as i pressuried to 5psi air started to leak from the other side of the valve. With the bailey valve fitted it managed to hold 10psi before starting to leak. I guess this isnt normal? Surely it will be unmetered air?
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  3. Paradox1
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    Paradox1 Active Member

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    [Apr 26, 2013]
    Theres a thread 2 down from this one that will tell you what to do mate
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  4. kirkmiles
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    kirkmiles New Member

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    [Apr 26, 2013]
    Didnt see that, very good post! what sort of issues would the leaking valve cause?
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  5. Alex C
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    Alex C Well-Known Member

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    [Apr 26, 2013]
    unmetered air issues
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  6. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Apr 26, 2013]
    Loss of boost and therefore power..

    <tuffty/>
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  7. kirkmiles
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    kirkmiles New Member

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    [Apr 26, 2013]
    Just been thinking, i didnt have any pressure applied to the small vac line on the top. Does this pressure normally keep the valve closed?
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  8. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Apr 26, 2013]
    Yes...

    <tuffty/>
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  9. kirkmiles
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    kirkmiles New Member

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    [Apr 26, 2013]
    Damn, thought id cracked it. Need to do some logs this weekend. can i do any logs to see if its fuel starvation? Ive changed loads of stuff, N75, MAF, coils, Plugs, all silicone hoses, AGU pancake pipe hose, injector seats,inlet manni gasket, cleaned TB. Now im lost :-( Only things i can think of are cracked exhaust manni or fuel starvation. Engine tone drops/changes when i get the problem.
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