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2001 jeep grand cherokee ltd 4.7L. Stalling, high oil press

by amougholias / March 3, 2011 3:55 PM PST

Hi,

I Purchased a 2001 Jeep Grand Cherokee LTD with a 4.7L engine.
Please keep in mind. I had the jeep fully inspected, when i purchased it. At the time it passed with flying colors. I have taken the Jeep to 3 shops. None or them are able to find the problem.

1 - Jeep will stall intermittently upon starting. Usally happens the when the engine is still warm.

2- Prior to stalling. The Jeep is idling very rough. Most of the time the engine idles slightly rough. When the rough idling is more severe, is when the Jeep stalls.

3- Jeep need to sit or engine needs to cool down for 20-30min. Before starting properly

4- Error codes showed engine running lean, #2 & #4 misfiring

5- Oil pressure gauge started running very high today, from 3 to 5.

6- I'm able to remove the key from the ignition, once Jeep is started and running.

7- Poor fuel usage. Current 24L/100km, Should Be 16L/100km

8- -New throttle body.

The following repairs have been done recently:

A- Fuel Pump
B- Fuel Filter
C- Cam Sensor
D- Injectors cleaned
E - New battery
F - New Serp belt
G - Oil changed with/ engine flush

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response to 2001 jgc stalling
by ezsoul / March 16, 2011 8:29 AM PDT

you should read up on some of the earlier posts, possible bad pcm, or bad crankshaft sensor or mat sensor, hard to tell without a volt meter. tell the mechanic to chech thos things out first. good luck.

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Response
by mobides / May 22, 2011 1:02 AM PDT

It's probably not the throttle body itself. It's probably the TPS (throttle position sensor) and/or the IAC (idle air controller), both located on the throttle body. They send information to the computer, and if they aren't working correctly, can cause a whole range of problems like the ones you've described.

The oil pressure problem is more than likely a OPS (oil pressure sending unit/sensor) problem. It's located just above the oil filter.

All the items are under or around $100 and fairly easy to replace.

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