Boost problem update
AudiWorld Super User
Joined: Apr 2001
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this is a lower one under the battery box - evidently its usually THE culprit
<center><img src="http://pictureposter.audiworld.com/18189/blownsamco_001.jpg"></center><p>
for shooting off. reverse angle from driver side fender.... battery would be in the lower left corner of the shot....
for shooting off. reverse angle from driver side fender.... battery would be in the lower left corner of the shot....
AudiWorld Uber User
Joined: Dec 2000
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Hmmm...Rare.....
Could be any number of things....Do we have no codes for sure? Sounds like hard limp, but there's usually a code thrown. Assuming no leaks (Big assumption) the two things that directly affect boost are the N75 (will default to 5 PSI if bad) and the N249 which controls the DV....Any escaping air noises through that?
Thread Starter
AudiWorld Super User
Joined: Dec 2004
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I was thinking that it was possible that the N75 was bad...>
but that wouldn't account for the boost to have slowly and steadily droped down to 5 psi would it. Don't think that it's hard limp, just checked for codes and got nothing.
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AudiWorld Uber User
Joined: Dec 2000
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The N75 could have gone bad..>>>
It's a solenoid though, so either good or bad usually. Your declining boost kinda threw me off on that...but could have been a sporadic connection issue...That plug has been know to go bad. The sell a replacement harness/plug for it.
If you can swap in a known good part it would confirm that suspicion..
If you can swap in a known good part it would confirm that suspicion..