oil pressure dropping
01-16-2012, 10:55 PM
#1
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Year: 1994
Model: Cherokee
Engine: 4.0 i6, 307 injectors
oil pressure dropping
How do I know if my oil pump is bad? Before when I drive 55mph my oil pressure was 40psi now its about 30
01-16-2012, 11:03 PM
#2
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how is this advanced tech?
I would verify those numbers with a mechanical gauge - could just be a lazy sensor
Good Readings:
*Not less than 13 psi at HOT idle
*Between 37-75 psi over 1600 rpms
I would verify those numbers with a mechanical gauge - could just be a lazy sensor
Good Readings:
*Not less than 13 psi at HOT idle
*Between 37-75 psi over 1600 rpms
01-17-2012, 06:27 AM
#3
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Year: 1993
Model: Grand Cherokee
Engine: 4.0L Laredo
Unless it's at 0 psi, the only way to know it's bad is by removing it and checking tolerances. Before I did that, i'd check for leaks around your oil pressure sending unit. It could still be bad w/o leaking, but in my experience they leak
01-18-2012, 04:07 PM
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Year: 1994
Model: Cherokee
Engine: 4.0 i6, 307 injectors
I replaced the oil pressure sending unit and my oil pressure is very low what is my next step
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01-19-2012, 05:37 AM
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