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Old 03-10-2020, 02:38 PM   #6
JFP in PA
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Join Date: Feb 2005
Location: It's a kind of magic.....
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Quote:
Originally Posted by flmont View Post
It was really all over the map,...from -0.35 to - 0.50 What does that mean,..
Plus I did a smoke test and it only leaked from air box,..( filter in wrong,.. fixed ), I didnt see any more obvious smoke . ? Thanks Frank
That is indication of a very low vacuum level, either due to a bad AOS, a low vacuum signal from the intake system, or a vacuum leak somewhere in the sump system.

I would test the vacuum level coming from the intake to the AOS, it should be very high.
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