Oil pressure concern
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Joined: Sep 2017
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Oil pressure concern
So I have a 1991 ranger 2.3 lima and long story short i did a cylinder head gasket and new head. The problem im having now is the oil pressure needle not reading right. When i start it cold needle read fine as truck starts to warm up it goes haywire and just goes to L in red zone, however if i hit the gas it goes to normal but when coming to stop at idle it goes back to red zone, I dont here any unusual noises coming from lifter or pump however I changed the sender unit already and its still doing it and i did a pressure test and it was reading 24psi when cold. Could this be a wiring issue or oil pump? The truck throws no engine codes or anything it actually running pretty smooth. I heard the oil screen can get clogged and cause this issue could it be that? I have a inspection camera to put in oil pan.
Cargo Master
Joined: Feb 2002
Posts: 2,414
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From: Tucson USA
easiest to do is hook up direct reading gauge and see if you have oil pressure or not. If it reads ok then you have a wiring or sender issue. I basically had same problem and installed a sender on the oil filter. Got it and gauge from Glow Shift.
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Joined: Sep 2017
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I did on cold start it was reading 24psi i believe i will double check i havent did warmed up psi which is when it goes wonky so I will do that tommorow, im going to get a oil cleaner dump in engine and let it sit over night.
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