Jeep YJ Bad idle need suggestions -
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Unread 05-03-2012, 06:44 PM   #1
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1992 YJ Wrangler 
Join Date: Nov 2011
Location: Jackson, New Jersey
Posts: 3
Jeep YJ Bad idle need suggestions

I have a 1991/1992. It a Frankenstien jeep. anyway a few days ago it decided it did not want to run right. it idled real rough almost sounding like a built V8 in stead of 2.5L 4 cly and also drove much in the same matter. i just did new plugs cap/rotor and wires. still runs rougher then all hell. When I unplugged the throttle position sensor it smoothly idled up then when right back to the same routine. when plugged back in, there is no change. So i am wondering if the Throttle sensor can cause this and if not than what? also my Fuel pump is now audible which it never before this happened. PLEASE HELP! thanks!

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Unread 05-04-2012, 01:26 PM   #2
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1992 YJ Wrangler 
Join Date: Jun 2011
Location: Beacon Falls, CT
Posts: 89
when was the fuel filter changed
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Unread 05-04-2012, 01:35 PM   #3
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1991 YJ Wrangler 
Join Date: Mar 2012
Location: Niagara Falls, NY
Posts: 1,876
Get the error codes from the computer first. Its easy and free, using the ignition key. Here's a video that shows how.

BTW welcome to JF, you've just found one of the best jeep sites anywhere!

***--- Wrecking Crew member ---***
"I've prolly been around longer than you think"
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2.5l , idle issue , idle jump , jeep yj , rough idle

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