How trust worthy??

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04-27-2007, 09:57 PM

Babz

Senior Member

Thread Starter

Join Date: Oct 2006

Posts: 210

How trust worthy??

If your boost gauge is reading -20 to -21 vaccum on idle then is it a sure thing that you dont have a vacuum leak??? Or could it be possible for our cars to have a vacuum leak and still read normal??

04-27-2007, 10:03 PM

onepoint8tee

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Join Date: Sep 2005

Posts: 13,665

RE: How trust worthy??

I had a vaccum leak even though my vac #'s were normal. Most of the time a vac leak is very small not obvious. If the leak is big enough to affect engine operation/performance-youll get a fault code or CEL.