Jeep has bad intermittent misfire and cuts out very bad!!! - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on
Old 05-18-2009, 12:19 AM   #1
Join Date: May 2009
Location: Mid Michigan
Posts: 3
Angry Jeep has bad intermittent misfire and cuts out very bad!!!

Problems started a year or so ago, but only occurred once a month or so and mostly on humid days. But, now it is doing it more often and randomly. It will start fine and run fine then after a minute it starts cutting out, like the timing is way off or has a bad misfire. Then after a couple minutes of doing that it clears up and runs ok for awhile. The problems started getting worse after I put some injector cleaner in the gas tank and it even made the engine light come on. Error codes that came up were 12, 27 (a couple times), 42, 43 (four times). Have not taken it to auto place yet to get more detailed codes.

I tried new distributor cap, rotor, plugs, plug wires. Put a different coil in, had fuel pressure checked which came back between 45 and 50 psi. Then got the 3M injector cleaner that hooks up directly to the fuel rail and ran a can of that through it. Timing doesnt seem to be perfect as when I took the old dist. cap off it seem to be sparking on the corners of contacts instead of in middle, but could not turn it to adjust as I know most do? Any ideas or suggestions would be appreciated, I'm about to the point of just dropping it off at a dealership....

Husky is offline   Quote Quick Reply
Old 05-18-2009, 09:49 PM   #2
mxracer513's Avatar
Join Date: Jan 2009
Location: Pittsburgh, PA
Posts: 160
Send a message via AIM to mxracer513
Sounds like there could be moisture in the electrical somewhere, like the distributer. Use die-electric grease and wd-40 on the electrical connections.
2000 TJ-4.5" Rubicon Express Super Flex Kit-1" Body Lift-35X12.50X17 Procomp M/T's-Dick Cepeks-Some other modifications
mxracer513 is offline   Quote Quick Reply

Quick Reply

Register Now

In order to be able to post messages on the Jeep Wrangler Forum 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 email 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

Posting Rules
You may post new threads
You may 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

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 12:04 PM.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC. is not in any way associated with the Chrysler Motors LLC