08-10 SS Turbocharged General Discussion Discuss the 2008 - 2009 Chevy Cobalt SS Turbocharged. On sale since the second quarter of 2008.

Bypass Valve Solenoid Testing

Old 01-26-2015, 12:52 PM
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Originally Posted by blueLNFftw
Interesting info here.
https://www.cobaltss.net/forums/08-1...riment-166386/


I am going to put the stock BPV in tonight. I think I found all of the pieces for it in the trunk of the car lol.
That dejon spring is just way too stiff. It was one of my first mods. I took it out because it caused way too much flutter.

The stock BPV only has 3 parts: cap, spring, and rubber diaphram. If you can't find all the parts, let me know. I still have my stocker collecting dust
Old 05-20-2017, 06:53 PM
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Bump from the dead because I will be testing mine soon
Old 05-28-2017, 06:29 PM
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Sub'd for reading after our Sunday night meet up
Old 06-19-2023, 04:06 PM
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I had a bad bpv solenoid. My car's symptoms were 7 PSI Max and a really weird whistling noise. I believe the bpv was being held open by the vac tank. Another weird thing is that if the car sat for 2 days would make boost again for a while I think vac tank would blead out. Never popped a code. Hope it helps good luck with your builds.
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