low oil pressure at idle and while driving

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01-05-2010, 11:25 PM

95yeti

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Year: 1995

Model: Cherokee

Engine: 4.0L 6cyl

low oil pressure at idle and while driving

my oil pressure when im idling after the engine is warm is only about 20 sometime lower and when drivng not much higher is there a problem here or is that normal? PLEZ HELP

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01-05-2010, 11:29 PM

SeriousOffroad

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Model: Cherokee

I'd try a new sensor first, or a mechanical gauge. If the pressure remains the same then it's time for a new oil pump

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01-06-2010, 06:36 AM

ktmracer419

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factory spec is 7 psi at hot idle. i wouldnt worry about it just yet.

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01-06-2010, 06:57 AM

SeriousOffroad

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Model: Cherokee

I misread the OP......

Quote:

OIL PUMP PRESSURE
The MINIMUM oil pump pressure is 89.6 kPa (13
psi) at 600 rpm. The MAXIMUM oil pump pressure
is 255-517 kPa (37-75 psi) at 1600 rpm or more.