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Vacuum Pressure 200 1979

posted by  someone claiming to be Mark on  Fri Nov 14 13:44 CST 2003 [RELATED]

I'm trying to get norms for my brick so that, if something goes wrong, I know what normal should be. That said, I tested the vacuum pressure on my brick (B21F engine with 143k miles), that seems to be running just fine. It was only 13" of mercury with fluctuations within 1" of mercury. I revved it up to 2500 rpm. The vacuum fell only to 5" of mercury, then went to 22", then back to 13" quickly. This seems low, so I sprayed carburetor cleaner all over the intake manifold and hoses and found no increase in idle speed. Am I missing something here?






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