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Old 11-26-2019, 09:29 AM   #35
BirdTRD
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Yup, sounds to me like you have a pretty good vacuum leak somewhere, whether it's the bypass valve or not remains to be seen.
Since the bypass valve is new, odds are it's not the problem, but you should still rule it out and not assume new = good. Re-check ALL the hose connections that were involved with the install, PCV, Evap, brake booster, etc. Once those are all verified to be good, you're left with the intake manifold gaskets because... a vacuum leak is a vacuum leak.
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