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Unread 04-27-2008, 08:52 AM   #1
wrangleryjman
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2002 TJ Wrangler 
 
Join Date: Jun 2007
Location: upstate ny
Posts: 139
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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Unread 04-27-2008, 11:07 AM   #2
timatoe
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1990 YJ Wrangler 
 
Join Date: Aug 2006
Location: Grass Valley California
Posts: 13,815
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.
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Unread 04-28-2008, 03:42 PM   #3
BlackSheep92
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1988 YJ Wrangler 
 
Join Date: Dec 2007
Location: South Jersey
Posts: 56
Excellent post
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Unread 04-28-2008, 04:42 PM   #4
ctm
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1990 YJ Wrangler 
 
Join Date: May 2007
Location: Boston MA
Posts: 1,432
I refer you to Mike Romain's posts regarding how the evap canister purge line can give inconsistent idle:

http://groups.google.com/group/rec.a...b145ada4f4c5f2

You can also search the CJ forum on this site for other similar posts.
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Unread 04-29-2008, 06:52 AM   #5
vadslram
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1990 YJ Wrangler 
 
Join Date: Jan 2006
Location: VA Beach
Posts: 4,875
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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