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High vacuum when car idle

gtiGreateness

Ready to race!
Hello all,

I have a P3 digital gauge, no Boost tap, plugged directly into the obd port. Vacuum during idle Usually reads between 19-21. However as of today idle is reading 9 PSI during idle. I know I have an exhaust leak, but this has been around for a month or two now. Just haven’t had a chance to look Into it yet.
Looking for help if this would cause the issue vacuum issue?


Thanks,
 
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