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Old 09-12-2013, 11:09 PM   #1
Chevys10dr
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Join Date: Feb 2008
Location: Fort McMurray, AB
Posts: 192
Vacuum issues need diagnostics.

I have a fresh 350, heavily worked 487 heads with a 272/272 .454/454 comp cam. it idles at 900 in park and 700 in drive and running a little rich, she only makes between 0-7 inches at idle of vacuum but when it revs up to 2000-2200 she pulls about 15 inches. What could cause this?

Thanks
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