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      10-02-2018, 10:19 AM   #23
harkes
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Drives: M135i, NSX and AE86
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Quote:
Originally Posted by HKD126 View Post
I use a 20psi check valve from ProMeth. Rodney (ProMeth) recommended it over the solenoid for the simplicity of my system.
20psi? What is the purpose of such big opening pressure? Full vacuum is 14.7 and I can hardly thick that an engine can make more than 10psi vacuum.

Could you try to do a flow test with/without the valve? Or maybe just remove the spring inside it - I'll try that tomorrow.
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M135i PWG, MHD, Pure Stage2, Torqbyte CM5-LT, xHP
(A Dane in China)