bad pcm? - Jeep Cherokee Forum
Jeep Cherokee Forum

Go Back   Jeep Cherokee Forum > Technical Discussion > Grand Cherokee Tech
Log In 

bad pcm?

Thread Tools Search this Thread
Old 08-04-2011, 09:05 AM   #1
Join Date: Jul 2011
Posts: 26

View im1986's Photo Album My Photos
Default bad pcm?

I have been trying to diagnose a misfire issue and I am having no luck. 1995 zj with the 5.2L v8. I am wondering what the symptoms of a bad pcm are? My jeep is runs very rough and sometimes hard to start.

I have replaced cap, rotor, wires, plugs, coil, fuel filter, and nothing has worked.

1995 Jeep Grand Cherokee Orvis Edition Build
im1986 is offline   Reply With Quote
Join Cherokee Forum

Join Today - It's Totally Free!

Do you love your Jeep? If so we invite you to join our community and see what it has to offer. Our site is specifically designed for you and it's a great place for Jeep Fans to meet online.
Once you join you'll be able to post messages, upload pictures of your jeep, and have a great time with other Jeep Cherokee fans.. Whether your an old timer or just bought your Jeep you'll find that is a great community to join. Best of all it's totally free!

Join Today! - Click Here JOIN FOR FREE

Old 08-04-2011, 10:13 AM   #2
CF Veteran
Bustedback's Avatar
Join Date: Feb 2010
Location: Oroville, CA
Posts: 11,712

View Bustedback's Photo Album My Photos
1995 Grand Cherokee

There is a plate at the bottom of the intake manifold that has a gasket that can blow out and cause a vacuum leak and misfire. I highly doubt that the PCM is causing the problem. You may also want to check the fuel pressure, could be a weak pump.
Steering stabilizers will not cure or cause death wobble, they only mask the real problem that is causing death wobble. Oil pumps do not make pressure, they create flow. Bearing clearence and restrictions make pressure. It's the crank sensor.
Bustedback is offline   Reply With Quote
Old 08-04-2011, 09:13 PM   #3
CF Veteran
Join Date: Mar 2010
Location: Elizabethtown, pa
Posts: 1,028

View tiwvr1's Photo Album My Photos
1994 Cherokee

Mine had similiar symptoms, would be hard to start when hot. Was the crank sensor, will cause a misfire too.
tiwvr1 is offline   Reply With Quote
Old 08-06-2011, 07:42 PM   #4
retread's Avatar
Join Date: Jul 2011
Location: Milw.Wi.
Posts: 120

View retread's Photo Album My Photos
93' Cherokee

pcm's rarely go bad but are commonly blamed
retread is offline   Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
I need a "no bus" expert stimp774 OEM Cherokee Tech 19 09-20-2015 06:03 AM
It keeps getting worse, please help. Stalling Ye Ol' Cherokee OEM Cherokee Tech 11 09-16-2015 12:34 PM
99 cherokee, pcm code and IAC code Girlski OEM Cherokee Tech 11 09-15-2015 03:31 PM
close to overheating Gauge OEM Cherokee Tech 15 09-05-2015 11:02 PM

Go Back   Jeep Cherokee Forum > Technical Discussion > Grand Cherokee Tech

Currently Active Users Viewing This Thread: 4 (0 members and 4 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

All times are GMT -5. The time now is 06:54 AM.

This site is in no way affiliated with Jeep or Chrysler.