NO BOOST? DUH check the Diverter valve.
#1
Burning Brakes
Thread Starter
NO BOOST? DUH check the Diverter valve.
Well I always thought that the brand new BOSCH diverter valve was not the culprit for the lack of achieving boost. DUH better to check than guess! Blocked off diverter valve by shoving a 1/2" pipe plug into the hose and presto!!! BOOST! Scheisse wish I would have checked that a long time ago. FYI getting an aftermarket one now. Looking at TurboSmart and FORGE.
Thanks
Mike G.
Thanks
Mike G.
#3
Burning Brakes
Thread Starter
I bought a legit one a few mins ago. It's machined from only the finest material available and I got it gold plated to match my Daytona Rolex watch. NOT!!
Mike G.
Mike G.
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David Floyd (04-30-2021)
#6
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Since the diverter valve on the '89 Turbo was last changed 20+ years ago, I ordered an APR R1 since I've had one on my modified A4 1.8T for 11 years with zero issues.
#7
Burning Brakes
Thread Starter
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#8
Three Wheelin'
#9
Burning Brakes
Thread Starter
Mike G.
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Cyberpunky (05-06-2021)
#11
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#14
Burning Brakes
Thread Starter
Installed new Evolution Motorsports BOV . There was an improvement but still can not reach 15ish psi on the stock gauge regardless of gear. FYI: The part is a very nicely made piece.
Mike G.
Mike G.
Last edited by Mike Goebel; 05-07-2021 at 01:18 AM.
#15
Burning Brakes
Thread Starter
Ok one more giant DUH!! Check all vacuum lines that go to the diverter valve. Dang mang the one that feeds to the top of the diverter had fallen off somewhere under the manifold. ALL IS GOOD IN BOOST land again. And wholly cow does a solid 2 BAR (Absolute ) boost make a difference.
Mike G.
Mike G.
Last edited by Mike Goebel; 05-09-2021 at 01:48 PM.
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David Floyd (05-07-2021)