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Turbo Bypass Valve is probably toast Posted by RS [Email] (#15) [Profile/Gallery] (more from RS) on Thu, 26 Nov 2015 18:32:44 In Reply to: Car Dies Between Gears, Henry Jones, Thu, 26 Nov 2015 03:14:32 Members do not see ads below this line. - Help Keep This Site Online - Signup |
also called the hooter valve.
It redirects turbo boost away from the throttle plate during deceleration and prevents a shock wave from forming when the stream of air hits a closed throttle plate and reflects back to hit the turbo's compressor blades and stop or slow the impeller.
To check it, find the vacuum tube that goes to the TBV from the intake manifold, pop it off the vacuum nipple and suck on it to see if it holds vacuum. If it doesn't hold vacuum, it's toast.
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