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Join Date: Jan 2007
Location: SoCal
Posts: 10,349
Intake vacuum leak is going to be mostly low rpm, high rpm manifold pressure is higher so leak is smaller, and much smaller as a percent of total air flow. Bad vacuum leaks that are compensated for at low rpm by adjusting mixture can also cause issues at higher rpm, but enough to cause missing seems unlikely.

Old 05-17-2015, 07:37 PM
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