Engine diagnostics using engine vacuum - ZR-1 Net Registry Forums

02-07-2015

#11

XfireZ51

Join Date: May 2007

Location: Chicagoland, IL

Posts: 9,708

Re: Engine diagnostics using engine vacuum

Quote:

Originally Posted by 9T1 Red ZR1

How much vacuum should you read on a stock 1991 at idle?

Should be in the 40+kPa range. With cams mine idles between 50-55 kPa.

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