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View Full Version : How much vacuum should there be in throttle body?


surreybc
06-25-2010, 05:47 PM
I only get 1 or 2 inches of vacuum at throttle. The aiv hose has a ton more vacuum. the egr only needs 1 or 3 inches vacuum to lift on my car.
trying to figure out why my egr valve is not lifting when i roar engine. my egr lifting abiltiy has slowly weakened until now i fail smog. Im thinking the exhaust hose going to bpt is clogged? i applied 30 inches of vacuum to egr solenoid and egr still did not lift.

lazysk8er2
06-25-2010, 11:45 PM
not sure what kind of motor your running but at idle my sr20 reads -20 psi

also its read in negative psi not just inches for vacuum

surreybc
06-26-2010, 02:09 AM
it must depend on where you measure.