90 wrangler yj idle problem - JeepForum.com
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post #1 of 5 Old 04-27-2008, 07:52 AM Thread Starter
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2002 TJ Wrangler 
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90 wrangler yj idle problem

hey i have a 90 wrangler 4.2 straight 6 and it wont idle everything above 2500 rpms is ok its the low end thats the problem. i have cleaned the idler tubes before and that was the problem thats prob what the problem again but even when i do that it doesnt idle steady it goes up and down. is there anything i can do to get it to idle better

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post #2 of 5 Old 04-27-2008, 10:07 AM
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1990 YJ Wrangler 
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Get familiar with this site.. http://home.sprynet.com/~dale02/list.htm

Do this .. http://jeep.off-road.com/jeep/articl....jsp?id=277064 OR Buy this kit .. http://jeepcarterbbdcarb.com/kit.html

I did the kit and haven't had a problem since. If you can do the Nutter Bypass.

Originally Posted by George Orwell
We sleep safe in our beds because rough men stand ready in the night to visit violence on those who would do us harm.
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post #3 of 5 Old 04-28-2008, 02:42 PM
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1988 YJ Wrangler 
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Excellent post

"Courage is not the absence of fear. It is the willingness to move forth despite it's presence"
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post #4 of 5 Old 04-28-2008, 03:42 PM
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1990 YJ Wrangler 
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I refer you to Mike Romain's posts regarding how the evap canister purge line can give inconsistent idle:


You can also search the CJ forum on this site for other similar posts.
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post #5 of 5 Old 04-29-2008, 05:52 AM
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1990 YJ Wrangler 
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I fought with mine and could never keep the idle clean for more then a week. I replaced the stocker with an MC2100 and I havn't messed with the thing since I put it in. My milage went up too.
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