Haynes says 35-45 PSI with the engine off and 30-45 PSI with the engine running and the vacuum line connected to the regulator. Disconnecting the vacuum line should result in an increase of 5 to 10 PSI.
SA
Dec 7, 2012 at 3:02 AM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.