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post #1 of 3 Old 05-05-2008, 02:14 PM Thread Starter
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1998 TJ Wrangler 
Join Date: Mar 2008
Location: Armada
Posts: 315
idling high

I took my jeep out for the first time today after it say since the beginning of march, i started it up every 2 days during the waiting period and revved it a bit, it ran okay, bit shakey but it was fine after a few miles, i pulled into the parking lot at kroger and put it in park and it was idling at 1500 rpms, hit the gas a bit and it still wouldnt go down, shut it off and start it up again and its around 1000 then drops back down to 600-700...

what gives?

also, how hard is it to put a wheel stud in the rear end? its a 98 limited with a dana 35c

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post #2 of 3 Old 05-05-2008, 02:21 PM
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2001 WJ 
Join Date: Dec 2007
Location: Indianapolis, IN.
Posts: 508
Happened to me a couple of years back. I cleared the ECM and all was fine. Pull a battery cable, turn the headlights on, wait 10 minutes, turn lights off, then reconnect the battery cable. Now.... you'll need to DRIVE for 20-30 minutes to allow the ECM "re-learn". Idling won't allow the ECM to re-learn correctly.

Good Luck!!

"Seems like common sense isn't that common anymore"
And by the way.... "alot" is NOT a word!!!!
1997 Gunmetal Blue XJ Sport - 4.0 L. I6 - 4 Dr. - 4x4 - 1.75" BB
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post #3 of 3 Old 05-05-2008, 05:36 PM
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1998 XJ Cherokee 
Join Date: Apr 2006
Location: Nolensville
Posts: 2,064
I'm running down this problem myself. It's intermittent, and I think it's the root of my 18mpg instead of the low 20's I should be getting.

I cleared the ECM after changing plugs, wires, and air filter. 2 months later, I still have problems with high idle. Last weekend I was going 40mph from a dead stop without ever touching the gas pedal. Put that puppy in neutral and it went to 3 grand on the tach and stayed there.

This weekend, my plans are:
Clean IAC
Clean Throttle Body
Check and Clean Throttle Position Sensor

If that doesn't work, I'm going to replace the forward O2 sensor.

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