Ask the Car People.SM


Jeep Grand Cherokee PCM

37 messages,  Last post on Sep 30, 2012 at 7:59 PM

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

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

Messages Page 4 of 4

#31 of 37 No start no spark no power to the pump. by oldmill76

May 19, 2012 (9:01 am)

I have replaced the crank and cam sensor but still nothing. Not getting fire from the coil but it tested fine. Cant just put a pcm in unless i have a good idea thats it. Ive ran all the tests i know to run and need help. It used to make me wait till the pump would pressure up and when it would finally pressure up the check engine light would flutter with it. The relay box would also make the clicking noise along with the fuel pump. It all took about a min for the pump to ingage. Once the pump ingaged and the relays quit clicking it would start and run good. Now nothing ..

#32 of 37 Re: AAAAAHHHHHHH [melbistylz] by desert_rogue

Jun 02, 2012 (2:28 am)

Replying to: melbistylz (Oct 22, 2011 6:53 pm)
I have a 2007 Cherokee SRT8 and recently it has started to die without warning or reason.
 
Dealer says the PCM is defective but am not so sure. it seems to be worse when it gets hot and also when the dealer "tested" it by giving it a good hard whack with the palm of his hand with the car running it stopped.
I believe the PCM will be rated for the extreme temperatures under the hood so I am inclined to think it is a bad contact. Would appreciate to have some info on what you found before I spend over $1,000 on a new PCM which might not cure the issues.
 
The only other items I thought bout were the crankshaft position sensors and the camshaft position sensors.
 
Any help you can give would be great. it does not suit being a yard ornament, it is meant to run.

#35 of 37 Jeep PCM by jeeppoor1

Jul 08, 2012 (11:28 am)

2000 JGC 136,000...getting ready to take into the shop that replaced the PCM 2x. This time after a week of getting it back after month of figuring out what's wrong,,,it's RPM runs between 500-1200 when stopped. The car runs rough and will jerk/hicup/jump during acceleration. Also the mileage, while it wasn't the bet before now is 2mpg less then before this all happened. Not sure what they will check for so any input would be helpful from the forum

#37 of 37 Re: code PO351 [heydeno] by djungbluth

Sep 30, 2012 (7:59 pm)

Replying to: heydeno (Jul 05, 2009 2:33 pm)
I have had the same problem. After changing all kinds of sensors and ign coil. I found a loose connection at the pcm. it looked fine , but I had my wife start it and I wiggled the plug and it died 3 times. I shoved a piece of cardboard between the antifreeze resevoir and plug. now it runs great.

Messages Page 4 of 4

To POST a message, please Sign In.

Advertisement

Browse by Category

Browse by Vehicle
   View All Vehicles

Browse by Board
Browse by Topic
View All Topics

Edmunds Community

Advertisement