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Unread 04-01-2013, 10:24 PM   #1
Bigphil
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1990 YJ Wrangler 
 
Join Date: Apr 2013
Location: Grayson, Ky
Posts: 7
Idle problems....

Hello, I am a owner of a 90 jeep wrangle....it has the 4.2 straight 6 cylinder...I am having issues with at idle.....I have replaced plugs, wires. Dist. Cap rotary button. And installed a new webber carb....I have checked compression all cylinders have 100 to 110..so Itake it no burnt valves....any help would be greatly appreciated.....new to the jeep scene but you guys rock..thanks

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Unread 04-02-2013, 07:42 AM   #2
Chris
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1990 YJ Wrangler 
 
Join Date: Jul 2008
Location: Wildomar/ Big Bear, CA
Posts: 2,555
Have you messed with the timing?
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Unread 04-02-2013, 09:05 AM   #3
hdfxrs91
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1987 YJ Wrangler 
 
Join Date: Mar 2006
Location: FL
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Check for vacuum leaks?
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Unread 04-02-2013, 11:19 AM   #4
JCashen
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1990 YJ Wrangler 
 
Join Date: Jan 2013
Location: Fort Worth, Texas
Posts: 225
Was the nutter bypass done previously? If not when you changed to a weber your computer still controls timing. Look up nutter bypass and make sure your timing is no longer controlled by the computer.
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Unread 04-02-2013, 01:36 PM   #5
Old4X
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1990 CJ7 
 
Join Date: Nov 2008
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Take the computer completely out and leave it out, useless once you changed the carb.
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418 miles on 19 gallons of gas. Can't beat the BBD !
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Unread 04-02-2013, 08:34 PM   #6
Bigphil
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1990 YJ Wrangler 
 
Join Date: Apr 2013
Location: Grayson, Ky
Posts: 7
Haven't messed with the timing......did think it had a computer, why would it....thanks fellas
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Unread 04-02-2013, 09:14 PM   #7
Old4X
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1990 CJ7 
 
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Location: Ga
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Computer is behind and under the glove box
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418 miles on 19 gallons of gas. Can't beat the BBD !
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