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Jeep Cherokee Grand Cherokee Engine and Performance Problems

729 messages,  Last post on Mar 20, 2013 at 10:59 AM

You are in the Jeep Cherokee and Jeep Grand Cherokee Forum.

What is this discussion about? Jeep Grand Cherokee, Jeep Grand Cherokee SRT-8, Jeep Cherokee, Engine, SUV

Messages Page 23 of 74

#214 of 729 2002 Jeep Grand Cherokee 4.0 L Oil Pressure Sending Unit by gaanel

Dec 27, 2006 (12:17 pm)

Hello,
Where is the sending unit for the oil pressure located on teh 2002 Jeep Grand Cherokee with the 6 cylinder engine?
Does anyone know why my pressure would suddenly shoot from normal to max pressure? Would it be the unit or the gage?
Also, someone has said that there are different sending units, some with 1 prong some with 2. What does the 2002 Jeep with 6 cyl take?
Thanks,
Gary

#215 of 729 Re: Jeep GC oil pressure problems [biz87] by poconojeep

Jan 17, 2007 (9:03 pm)

Replying to: biz87 (Oct 04, 2006 10:31 am)
I'm having the same problem with a 2001 Cherokee that's just shy of 100k. Oil pressure is fine when cold or when I've got my foot on the gas. As soon as I stop, it drops, and if I'm stopped long enough I get a check engine light. Had it at the garage today and they checked the pressure and were getting a low reading at idle, which I guess means it's not an easy fix like a sending unit. Their diagnosis was maybe oil pump, but they couldn't guarantee and were giving me quotes on a new engine. I've seen lots of posts here and elsewhere of Jeep owners with the same problem, but so far no overriding solution. Has anyone found one? I cannot afford a new engine. In fact, right now a Toyota is looking awful tempting.

#216 of 729 my oil pressure gauge reads maxed out by parkerjd

Jan 18, 2007 (8:42 pm)

This started a couple of weeks ago. I have a 2000 grand cherokee 4wd 6cyl, great truck. My oil pressure gauge reads all the way to the right which is 80. This happens after starting the jeep. The gauge will read 80 with only a slight movement. The jeep still seems to run fine. Does anyone have an idea on how to fix this?

#217 of 729 Re: Jeep GC oil pressure problems [poconojeep] by csamy2

Jan 20, 2007 (9:25 am)

Replying to: poconojeep (Jan 17, 2007 9:03 pm)
my 2001 grand Cherokee has the same problem. I talked to a mechanic and he told me that it was probably the oil pressure sensor and told me to let it idle in park for 15 mins and if there is no knocking or valve noise that it's the sensor. I did it and there was no noise so now all I have to do is find out where the darn thing is so I can change it.

#218 of 729 Re: Jeep GC oil pressure problems [csamy2] by poconojeep

Jan 20, 2007 (5:34 pm)

Replying to: csamy2 (Jan 20, 2007 9:25 am)
I think the sensor is right near the oil filter, at least I saw something that looked sensor-like when changing my filter yesterday. I'm not sure if my old filter was loose, didn't seem like it when I fought to get it off, but after putting on a new and higher quality one the problem has lessened. My oil pressure is still dropping when I idle, but not low enough to make the check gauges light come on. This seems like way too easy of a fix so I am still holding my breath.

#219 of 729 Re: Jeep GC oil pressure problems [poconojeep] by tuggajb

Jan 23, 2007 (7:11 pm)

Replying to: poconojeep (Jan 17, 2007 9:03 pm)
change sencor first do it yourself sounds as if the are out to get you if no engine noise at idel probly oil pressure is ok only need 15 lbs at idel on straite 6

#220 of 729 Re: Jeep GC oil pressure problems [poconojeep] by csamy2

Jan 30, 2007 (4:47 am)

Replying to: poconojeep (Jan 20, 2007 5:34 pm)
After trying all the car parts stores in town I finally had to go to the Jeep dealership to get the oil pressure sensor. Had to buy a deep well socket too. Of course it snowed today so my car was covered. I took it to heated building to work on it. It wasent that hard to do after I figured out I had to take the oil filter off first. Now I have 55 psi of oilpressure while driving and it never drops below 40 psi when I let it idle. There was a lot of oil on the wire side of the old sensor so I'm assuming it was cracked. Anyway it's fixed for the time being anyway.

#221 of 729 1999 Jeep Cherokee with no oil pressure when warm or when idling? by patdower

Feb 14, 2007 (11:47 am)

when i start my Jeep the oil pressure is a little lower than normal, as it warms the pressure drops, eventually to zero and the check guages light comes on. When I accelerate the check guages light shuts off and the pressure rises slightly, only a little bit! I have plenty of oil, and I had it changed 3000 miles ago. What is my Jeeps problem?

#222 of 729 Re: 1999 Jeep Cherokee with no oil pressure when warm or when idling? [patdower] by dsmans

Feb 18, 2007 (11:06 am)

Replying to: patdower (Feb 14, 2007 11:47 am)
I have a 2000 Jeep GC and have just experienced the same problem. Today was the first time it dropped to zero however, and the check guages indicator came on. I was told before from Valvoline that a wire was off and they put it on, but the sending unit will have to replaced eventually if the problem persists. I will have to have the dealer confirm this week.

#223 of 729 Re: 1999 Jeep Cherokee with no oil pressure when warm or when idling? [dsmans] by dsmans

Feb 21, 2007 (6:14 pm)

Replying to: dsmans (Feb 18, 2007 11:06 am)
Ok, this is dsmans again. First I want to thank all that have commented on this particular problem.
 
On 2/18 I wrote I had experienced the sensor problem. Since then, I have bought it to the dealer. They had the car all day and I called at 4:30 that aftrnoon only to find out that the sensor was checking out fine and that I had no pressure. What they then told me is the next step is to drop the pan and go in and assess the damage my engine has suffered. The beginning price to drop the pan began at $483. Secondly, most likely I was looking at getting a new engine. I said stop right there, I'll come pick it up and get a second opinion. After reading the comments here, I realized that my engine is fine, my oil is clear, I have no knocks, pings, or smoking, car running hot et al. I bought it to a AAA rated local autoshop and they replaced the sensor and the pressure was reading where it should be after idling. If it does go down again, they suggested, as long as the engine is fine, not to worry about it too much. I'd spend more trying to find out what the problem is.

Messages Page 23 of 74

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