88 Wrangler misses/dies at low idle - Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > YJ Jeep Wrangler Forum > YJ Tech Forum

Join Wrangler Forum Today

Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 07-18-2009, 09:59 AM   #1
Join Date: Jul 2009
Posts: 2
88 Wrangler misses/dies at low idle

Trying to figure out where to spend $$ first on this....... 88 wrangler 4.2 , Carter 2 Bbl with 3 speed Auto Trans and about 170,000 miles.

Problem: there is a noticeable miss at low idle; and when pulling out of parking spaces or stopped at traffic lights it often misses and dies. I've adjusted the low idle a little bit but it still happens, mostly around 600 RPM.

I sought the advice of a mechanic (who is a diesel guy and admitted not knowing much about carburetor engines). He put new spark plug wires, plugs and a new rotor in but no fix. He suggested it might be the distributor.

I'm wondering if I should put some kind of different carb in it like a motorcraft?
should I start by replacing the distributor?
OR maybe just both?. Like everyone $$ is tight and I'd like to take my best shot at it first.
Any suggestions appreciated
beyondthepale61 is offline   Quote
Old 07-18-2009, 01:32 PM   #2
Join Date: Apr 2009
Posts: 62
While I will agree that the cater carb isn't from Jeep's best hour, lets try to figure out the problem first. You pulled the plugs. How did they look. I have a 1987 yj with a 4.2L and had a similar problem. My solution was to CORRECTLY time the engine, Correctly route all the vaccuum lines as best as I could, and finally readjust the carb. I found my mixture screws were only 3/4 of a turn out, and at idle the engine was a little shakey. I gave it another 1/2 out and WOW what a difference. Smoother idle and it actually as a bit of power too. This should work on your jeep as well altho' my 87 is running a 1983 non-feedback style carter carb off a late model cj.

Coviello Racing

Covrace is offline   Quote
Old 07-18-2009, 06:19 PM   #3
Join Date: Jul 2009
Posts: 2
Thanks for writing back Jake....
I'm not a very good mechanic and I'm not sure what stuff is SUPPOSED to look like...the mechanic took the plugs out as kind of a shot gun remedy.

Where can I look to see what "right" is supposed to be?
beyondthepale61 is offline   Quote
Old 07-18-2009, 07:04 PM   #4
yjwes's Avatar
Join Date: May 2009
Location: howell nj
Posts: 369
is the engine running rough or is thare a miss?
yjwes is offline   Quote
Old 07-18-2009, 09:00 PM   #5
Join Date: Apr 2009
Posts: 62
"correct" plugs are fairly clean, tannish in color with a slight ash to them but the cleaner the better. a decent service manual will serve you well. And I must admit, When trying to correct my rig, I had down the street another totally stock, unmolested 87 jeep to take pictures and make notes on.
Covrace is offline   Quote
Old 07-19-2009, 11:11 AM   #6
after birthday glow
morphious's Avatar
Join Date: Jul 2009
Location: wisconsin
Posts: 1,963
i would suggest the nutter conversion i'm in the process of doing that right now all the people i'v talked to have claimed it makes the thing run way better
some say why i say
its a jeep thing u wouldn't understand
morphious is offline   Quote
Old 07-19-2009, 11:56 AM   #7
ncfirefighter217's Avatar
Join Date: May 2009
Location: charleston,sc
Posts: 24
i also have the same problem and i sent my idle control cyliniod off for reman bcause it wasnt working its the round thing that mounts on your carb with a power wire and also a vacum line coming to it it is suposed to keep u running at idle or when stopping hold your idle up a little to burn out the extra gas in the carb mabe this works i dont know hope fully it will

ncfirefighter217 is offline   Quote

Thread Tools

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
4.2 carb problems stray YJ Tech Forum 20 09-29-2014 10:02 PM
1998 Wrangler High Idle, w/ New TPS Broadcastmatt TJ Tech Forum 25 05-20-2009 09:07 PM
2008 Wrangler Purchase soupy1957 JK Pics Forum 23 11-22-2007 04:48 AM
Very Sad I bought a Lemon... Jahaira_JeepYJ89_fan YJ General Discussion Forum 19 07-13-2007 03:01 PM
92 wrangler won't idle toadster TJ Tech Forum 1 05-18-2007 09:18 AM

Download our Mobile App

» Featured Product

All times are GMT -5. The time now is 12:55 PM.

User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.

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