1999 XJ Sport Oil Pressure Gauge
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Joined: Aug 2023
Posts: 7
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From: Central Virginia
Year: 1999
Model: Cherokee (XJ)
Engine: 6 cylinder
The Oil Pressure Gauge with the engine on pegs at 80psi ~ Replaced the sender with the same problem ~ Put in another sender, and get the same problem ~ Not being to smart I tried one more sender with the same result. (Repeating the same thing over and over and getting the same result is the definition of crazy). A dealer who shall remain nameless scanned for the problem and said it was the PCM unit. Got a rebuilt unit - Still have the same problem. Any ideas short of putting in a mechanical gauge? Anyone?
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Joined: Aug 2019
Posts: 1,468
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From: Littleton, CO
Year: '96
Model: Cherokee (XJ)
Engine: 4.0 HO
My gauge always showed the same psi also, but not quite 80...right at 40psi or so. I went through a couple autozone sensors due to this until I bought a mopar one from the dealer. I dont know if it will be any better because I have to rebuild my motor first. I have to rebuild it because of the last autozone sensor that blew out the back and i lost all my oil driving down the highway. Now my motor sounds like crap and has a piston slapping around REAL bad.
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Joined: Jan 2012
Posts: 3,170
Likes: 312
From: Australia
Year: 1997 (RHD)
Model: Cherokee (XJ)
Engine: 4.0 ltr
The Oil Pressure Gauge with the engine on pegs at 80psi ~ Replaced the sender with the same problem ~ Put in another sender, and get the same problem ~ Not being to smart I tried one more sender with the same result. (Repeating the same thing over and over and getting the same result is the definition of crazy). A dealer who shall remain nameless scanned for the problem and said it was the PCM unit. Got a rebuilt unit - Still have the same problem. Any ideas short of putting in a mechanical gauge? Anyone?

Verification with a mechanical pressure gauge would be recommended before anything else
Curious: What oil and filter currently? Changed recently?
Last edited by Roler; Jul 29, 2024 at 05:32 AM.
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