2001 Jeep Cherokee oil pressure

2001 JEEP CHEROKEE
90,000 MILES • 6 CYL • 2WD • AUTOMATIC
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HEAD2004
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my jeep will hold at 40psi oil pressure until i stop and let it idle then it will fall to less than 20psi, and sometimes i have take it out of gear and accelerate to get the oil pressure back up to 40psi. this is all according to the gauge. i have replaced the oil pressure sender. also is there a saftey device to shut the engine off when the oil pressuse get to low on this model jeep.
Jul 25, 2008 at 10:31 AM
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RASMATAZ
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Check the oil pressure with a mechanical gauge at idle and 2K rpms then comeback with the readings-
Jul 25, 2008 at 12:47 PM
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HEAD2004
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[quote:7d965402ee="rasmataz"]Check the oil pressure with a mechanical gauge at idle and 2K rpms then comeback with the readings-[/quote:7d965402ee]
Jul 25, 2008 at 2:03 PM
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GREGDAWSON
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I have a 2001, 160,000 miles, hooked up a mechnical gauge where I removed sending unit and I register very low PSI at idle, but when you get to 2,000 rpm it jumps to 25 psi, at 3,000 rpm it jumps to over 30 psi. I was told it was fine to drop low at idle, but it should be over 8 psi at 2,000 rpm. Your sending unit could be bad, I suggest putting a mechnicial unit in place of the sending unt to see what the pressure is. Even a working electrial unit will not rapidly react and report pressure.
Jul 26, 2008 at 8:59 PM