Oil pressure gauge drops to 5# or less at idle and chime starts when hot. Using scanner for readings. NO internal engine noise ( bearings or lifters ) at idle. Engine is quiet. Replaced oil pressure switch w/ o.E. Service switch. Replaced oil pick up tube "O" ring. Pick up screen clean. Replaced oil pump w/ o.E. Service pump. New oil filter and 10/30 oil. Have pressure at cold start ( no engine noise on cold crank). Oil warms up, pressure drops, chime sounds at idle. No prob. Off idle. Gauge seems slow to respond. Is this oil press. And chime possibly an electrical issue with the cluster or ECU? I'm a retired ASE Master. Specialty in foreign vehicles, GM was not my expertize.
have the same problem?
Wednesday, July 23rd, 2014 AT 11:47 AM