Intermitent Backfiring 4.0 Common Cure? -
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back > Models > Jeep Grand Cherokee & Commander Forums > ZJ Grand Cherokee Forum > Intermitent Backfiring 4.0 Common Cure?

The Cure for your Tie Rod Roll!Steering and more from Ruffstuff!Introducing MONSTALINER™ UV Permanent DIY Roll On Bed Line

Unread 02-10-2013, 12:57 PM   #1
Registered User
1998 ZJ 
Join Date: Jun 2010
Location: St Paul, Minnesota
Posts: 13
Intermitent Backfiring 4.0 Common Cure?

1998 Grand Cherokee 4.0 120k

so this problem has been plaguing me for a while now.. It is very intermittent and I just can not seem to track down what the sam hill is going on. 99% of the time when I start the Jeep in the morning or after work, it starts up and idles fine. I let it start coming up to temp and then after I start to drive it at light throttle the Jeep will buck, sputter, backfire and have almost a complete loss of power. Usually I can put it in neutral , rev it up a bit and go about my business. After this happens it will drive fine for the rest of my trip and sometimes it will run perfectly for days with no problems at all.

I have searched all of the threads and the question keeps coming up but nobody says Here is the cure, I fixed mine.

It seems to be a common problem in Jeeps over 10 years old and over 100,000 miles.

Is something loose in my catalytic converter and blocking my exhaust temporarily?

It acts like it is vacuum related because it always seem to happen under light load while cruising.

Any thoughts or how you cured your intermitent backfire

pinion is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. is not in any way associated with Jeep or the Chrysler Corp.