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Discussion Starter · #1 ·
Car was making somes noises which I suspected were the DV, so I decided to install the bosch/MTM sportvalve from Joe Hoppen Motorsports on my Passat.
Seems to have cured the "Voop" noise between 2000-3000 rpm at light throttle. Still get an occasional squeal sound when accelerating from a standstill.
Old valve seemed to be working ok (ie not leaking boost and doing the bypass function correctly), I think the newer part with higher rate spring is what cured the voop noise (resonance?)
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