Oil pressure gage reads high - ZR-1 Net Registry Forums

David Hill · 07-24-2006

First time post, need info on high oil pressure reading. My ZR-1 (90 #2940) oil pressure gage pegs out and will only drop to 3/4 when engine warms up and is at idle. Per the GM bulletin 91-451A-8C I replaced the sensor (from Tom Henry Chevy) hoping to clear up the problem. After installing the new sensor, gage registered a little over 3/4 on start up of warm engine and dropped to 1/2 at idle. All seemed well as I reved engine, pressure increased and never exceeded the 3/4 mark. Patted self on back and called it a night. Next day cranked up only to once again see the gage pegged out. Drove around for about 30 minutes and gage dropped to 3/4 at idle but would peg out as rpm's increased. Anyone have any ideas, Thanks for your time.

07-24-2006	#1
David Hill Join Date: Dec 2005 Location: Fort Payne, AL Posts: 4	Oil pressure gage reads high First time post, need info on high oil pressure reading. My ZR-1 (90 #2940) oil pressure gage pegs out and will only drop to 3/4 when engine warms up and is at idle. Per the GM bulletin 91-451A-8C I replaced the sensor (from Tom Henry Chevy) hoping to clear up the problem. After installing the new sensor, gage registered a little over 3/4 on start up of warm engine and dropped to 1/2 at idle. All seemed well as I reved engine, pressure increased and never exceeded the 3/4 mark. Patted self on back and called it a night. Next day cranked up only to once again see the gage pegged out. Drove around for about 30 minutes and gage dropped to 3/4 at idle but would peg out as rpm's increased. Anyone have any ideas, Thanks for your time.