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Unread 04-02-2013, 11:13 PM   #1
Reno72
Senior Member
1992 YJ Wrangler 
 
Join Date: Jan 2013
Location: Cardiff by the Sea - Glamis North, Ca
Posts: 544
fast idle and I think I know why

I have intermittent fast idle, only when i let off on the gas slowly. I have tracked it down to my throttle body valve not closing all the way when I let off on the gas. If i punch the gas pedal it returns to normal. If I push the throttle shut by the return spring on the throttle body it idles fine. So, do I need to clean the throttle body while off the jeep, I tried to clean it by hand but it didn't help, or would a stronger return spring do the trick, do these springs wear out?

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Unread 04-03-2013, 07:44 AM   #2
VirginJeeper
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1995 YJ Wrangler 
 
Join Date: Aug 2011
Location: Arlington, Va
Posts: 391
Look at that grub screw underneath the throttle cable, I read an article in JP magazine that was exactly the same as what you wrote. There are bearings inside the TB that could go bad if not greased but it would be unlikely. Check where the able comes through to make sure it's not catching the sleeve.
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Unread 04-03-2013, 07:53 AM   #3
Siva283
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1995 YJ Wrangler 
 
Join Date: May 2011
Location: Falling Waters, WV
Posts: 3,697
Make sure your throttle body is clean as well. Mine got a little build up in it and would not close all the way. I took 5 mins to clean it and no problems since.
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1995 YJ. 2 inch BDS Spring lift. 1 inch shackle lift. 1.25 inch JKS Body Lift 33x12.5x15's. Engo 10,000 pound winch.

[QUOTE=Magnum;14117863] I gave the Jeep the required offering of $$, sweat, and blood, and everything works fine now. -- Jim[/QUOTE]

[QUOTE=ldso;16498409]. It started with a $200 axle, and a few thousand dollars later I was done :)[/QUOTE]

[QUOTE=Luuca;16122017]diagnose the real issue before you start going all Obama on it - spending mad cash you'll need for other important things.

Ask me how I know...[/QUOTE]

[QUOTE=Overhead;17658665]this is also my second set of RC springs this year. I'd rather spend the money again and get something that will last.[/QUOTE]
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Unread 04-03-2013, 10:28 AM   #4
Reno72
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1992 YJ Wrangler 
 
Join Date: Jan 2013
Location: Cardiff by the Sea - Glamis North, Ca
Posts: 544
Thanks guys, gives me a couple areas to check.
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