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Old 04-26-2012, 06:55 AM   #24
Brother EddieJ.
Scooby Specialist
 
Member#: 181617
Join Date: Jun 2008
Chapter/Region: MAIC
Location: frederick, md
Vehicle:
2004 wrx
6speed/ 330whp/ 300wtq

Default

You are getting a misfire because of the vac leak. We have boost gauges for a reason. You are way over thinking this at idle you should be a 20in/hg. That proves you have a leak. Pressure test the system, find the leak and bam problem solved. Under negative vac you are pushing metered air out under positive vacuum you are sucking in unmetered air. What you are doing now is wasting your time and money.
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