weird things
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Joined: Mar 2010
Posts: 12
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From: salem SC
Year: 1993
Model: Grand Cherokee
Engine: 4.0
ok bought this 93 zj 4.0 inline six runs great but i charged the ac an the fun begain the oil pressure went crazy it idles at a normal 20 psi if u touch the gas it goes to 80 if u drive it it bounces from 50 to 80 at 50mph when its at 80 and u mash the gas it will drop to 50 let off the gas back to 80 i changed the oil and filter no change any ideas
i'd replace the sender first since i'ts quick and cheap. if the problem continues you could get a mechanical gauge and screw it into the oil pressure sender port to determine weither the problem is in the engine or the guage circuit.
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