Engine will not stay running?

ELIDA GARCIA

MEMBER
1999 JEEP CHEROKEE
4.0L
6 CYL
2WD
AUTOMATIC
216,932 MILES

I got a new motor about 4 months ago, but the vehicle only ran for 9 weeks. One day I was driving, and it lost all power and shut off on me. I haven't been able to keep it on since it starts right away but if I start driving it loses power right away, I can't even go 20 feet. I bought a new battery in May. I also replaced the transmission solenoid sensor, got a new transmission filter, and replaced the fuel line. Someone keeps telling me it's the PCM that needs to be replaced but I'm not sure. I don't know what it is. I was hoping you could help me out.

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
42,959 POSTS

Sure, we can help, I would start with a CAN scan to see what comes up because it sounds like the crankshaft angle sensor could be bad. You can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

This guide can help as well:

https://www.2carpros.com/articles/car-not-running-advanced

Here is the location of the sensor in case you need it. Check out the images (below). Let us know what happens and please upload pictures or videos of the problem so we can see what's going on.

Images (Click to make bigger)

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Tuesday, June 20th, 2023 AT 5:40 PM

ELIDA GARCIA

MEMBER
2 POSTS

I went to AutoZone and got a diagnostic on my jeep grand Cherokee Lerado, and it said transmission oil pressure sensor and transmission control solenoid diagnostic trouble codes said power train system. Secondary dtcs p1769 governor pressure sensor offset. Low pressure EGR actuator control circuit low positive. I also got a mechanic to come out and plug in his diagnostic machine and the same things popped up, so I replaced transmission control sensor and governor pressure sensor and EGR actuator but it's still turning off I got a new fuel filter and fuel regulator but not the pump yet. The guessing game is becoming expensive when my Lerado turns off it says check gages that's the only thing lighting up I'm going to try what you said next.

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Tuesday, June 20th, 2023 AT 6:06 PM

KEN L

MASTER CERTIFIED MECHANIC
42,959 POSTS

When it stall I would have a can of starting fluid to see if the engine will run on that. You will need a helper to crank the engine over. If it runs this is a clue the fuel pump has gone out.

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Wednesday, June 21st, 2023 AT 10:04 AM