Oil pressure gauge
12-17-2010, 02:53 PM
#1
Newbie
Thread Starter
Join Date: Dec 2010
Location: oklahoma
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Grand Cherokee
Engine: 4.7liter V8
Oil pressure gauge
Today at a couple of stoplights my oil pressure gauge bottomed out. As soon as I idled up to go the pressure went back up to where it should be. It doesn't do it everytime I stop and idle, but it did do it three different times. When I turn off the engine and restart it, the pressure goes back to where it should be. Any ideas? Is my oil pump going out or could it be a faulty pressure switch?
12-19-2010, 06:56 PM
#4
Newbie
Thread Starter
Join Date: Dec 2010
Location: oklahoma
Posts: 7
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Grand Cherokee
Engine: 4.7liter V8
I've noticed on some similar threads that the sending unit could also be the culprit. Do those things have a history of going bad?
12-31-2010, 12:24 AM
#5
Newbie
Join Date: Dec 2010
Posts: 1
Likes: 0
Received 0 Likes
on
0 Posts
Model: Cherokee
I just had the same problem. Initially the oil pressure dropped to zero when at idle and when driving the pressure would return to around 40. I replaced the oil pressure switch, when doing this I noticed that oil was leaking from the switch. After I replaced it, it started doing the inverse. The oil pressure at idle was around 40 and when driving it would go to zero and the check gauges message would illuminate and the chime would sound. This become very annoying. So I took out the new oil pressure switch and connected a manual gauge to measure the oil pressure at idle and with increased rpm(s) it was fine. The new oil pressure switch that I purchased from Schucks/Oreilly's BWD brand was faulty. So I bought a new one from NAPA autoparts Eckland brand and it fixed the problem. First you will have to remove a metal plate protecting the underside of the engine (very simple 4 bolts). Then I removed the oil filter which allowed me access to the oil pressure switch. When removing the oil pressure switch you will need to disconnect the wiring harness, can be a pain. Then you will need a 1 and 1/16 inch deep socket to get the sending unit out. Once out put the new one in hook up the wiring harness and replace the oil filter. Put the plate back in place. Now it should be good as new.
Thread
Thread Starter
Forum
Replies
Last Post
idahomike
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
84
06-17-2016 07:39 AM
Blackxj51
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
22
09-13-2015 06:06 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)