low oil pressure at idle

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May 10, 2011 | 02:21 PM

#31

91armygreenXJ

Junior Member

Joined: May 2011

Posts: 62

Likes: 0

From: ohio

Year: 1991

Model: Cherokee

Engine: 4.0

if your jeep has a lot of miles on it your bearings could be worn out, but since you said that it was right after an oil change thatd be ruled out. the sending unit could have been damaged and/or they put a low weight oil in it. oil gets thinner as it warms up.

Apr 24, 2013 | 11:16 AM

#32

banshee1545

Newbie

Joined: Mar 2013

Posts: 2

Likes: 0

Model: Cherokee

Quote:

Originally Posted by yreka1969

2001 XJ 168,000 miles. After engine gets warm, I put this into park & let it idle for a couple of minutes & check gauges light comes on & oil pressure goes to zero. When I drive it, the pressure goes up to about 10 lbs. I just bought this Jeep & this problem started a couple of weeks after I bought it. There was a new aftermarket sending unit on it & now it has OEM. Same problem with both. I bought this with the intent to replace the motor, just not this soon. Oh, yeah, there are no ugly noises. Thanks for any help.

I had this same problem on the same year cherokee. I replaced the oil pressure sensor that is on the side of the block right above the oil filter and it fixed the problem.

Apr 24, 2013 | 01:08 PM

#33

Morris4x4Center

Former Sponsor

Joined: Mar 2011

Posts: 1,109

Likes: 0

From: Pompano Beach, FL

Quote:

Originally Posted by RichardJeep

I have a 2001 XJ and on cold starts my oil pressure gauge reads roughly 40 psi (normal). As the engine warms up the pressure starts decreasing to the point when I come to a complete stop the pressure drops to zero and the check gauges light comes on. It does not run rough. I was about to replace the sending unit this weekend, but I wanted to know if anyone has any other ideas what it might be.

does it just drop out of now where to 0PSI?

Apr 25, 2013 | 08:01 AM

#34

pisces3737

Newbie

Joined: Mar 2013

Posts: 29

Likes: 0

From: Qld Australia

Year: 1998 "Sport" White Wagon

Model: Cherokee

Engine: 6cyl

From Purchase the Check Guage Light On...Dash Guage NOT working...Relaced with After Market & Still NO Good! The Auto Elect Replaced with NON After Market & its 100% Working the Guage .....& Check Guage Light Is NOW Off On the Dash...Oil Pressure is Working On the Dash.. pisces3737