hello,
i have a 2002 audi a4 with an upgraded garret turbo cold air intake intercooler stage 4 clutch etc...recently my car has no power. when i drive just slowly you cant notice any thing but as soon as the turbo starts to spool up it just loses all pressure completely cause my car to cut out almost stalling. i brought to a dealer and they scanned my car and was told that i had a intermittent misfire to cylinder 3. they said it was either my fuel pump or spark plug coils. i replaced all 4 plugs and coils and also the fuel pump. car is exactly as before.. now there advising me to spend another $250 to replace the DV. i feel like im spending money on there "guesses" and am looking for good advice. thanks

 

Sounds like they are guessers instead of diagnosticians. Did they do a fuel pressure/volume test on the fuel pump?
The dv valve could be the problem , not sure how to check off hand but maybe someone else here could chime in & offer a way for testing them.

 

yea thats the impression i was getting...to the best of my knowledge they did not do that test...i was doing some research for bov and dv and i found that just about all say theyll fit all 1.8t. i have a bov from my old tt...was thinking of switching it in and if the problem is solved than i can order a new dv if not i can just put the one i have back in.. is there any reason i shouldnt do this?