Oil Pressure Issues
03-25-2019, 08:34 AM
#1
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Model: Cherokee (XJ)
Oil Pressure Issues
96 XJ with the 4.0. When I start cold the oil pressure is about 50 at idle and 70 moving. If I'm driving as long as I'm moving the oil pressure will stay high, but if I slow down the pressure drops a little bit and the highest it will go will be about 50. If I come to a complete stop it will drop to about 25 at idle and 40 moving. This is as low as it will go. Is it oil pump related or worse? Thanks.
03-25-2019, 08:36 AM
#2
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Year: 1999
Model: Cherokee(XJ)
Engine: 4.0
Oil is probably just warming up and offering less resistance. Those pressures seem fine. I've heard as a rule of thumb you're good as long as you have 10 psi of oil pressure for every 1000 rpms.
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