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Unread 09-08-2007, 11:25 AM   #1
tony dz
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1979 CJ7 
 
Join Date: Jun 2007
Location: Grand Haven, MI
Posts: 178
Carb refresher
Need a bit of a carb refresher.. It idles about 900-1000 when cold, but after warming iup it idles about 1500-1600. First, I assume this is high, am I right? If so how do I adjust it down? I see reference in my manuals to fast idle adjustment. Is this what I want?

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'79 CJ7 that will never be done - 258 I-6, T150, Dana20, Narrow Track AMC20/Dana 30 3.54 w/Trac-Lok, 31 BFG's, Team Rushed
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Unread 09-08-2007, 11:43 AM   #2
kavephish
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1981 CJ5 
 
Join Date: Feb 2007
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Yes, fast idle adjustment. Does it still idle high after you "kick it down" (tap the accelerator)? If so you should just be able to back the idle adjustment screw off to drop thje RPM's
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Unread 09-08-2007, 11:46 AM   #3
tony dz
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Thanks.. No it doesn't drop after I kick it down.. What's that point to?
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Unread 09-08-2007, 11:50 AM   #4
kavephish
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most likely idle screw set too high. However, if it just started idling high all of a sudden you might be looking at a carb or vacuum problem.
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Unread 09-08-2007, 12:04 PM   #5
tony dz
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1979 CJ7 
 
Join Date: Jun 2007
Location: Grand Haven, MI
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Just noticed my Haynes manual says the "fast idel speed setting" is 1500, which is about where I idle when warm. Just making sure I'm understading this spec correctly. Does this mean I'm OK as is?

1500 still seems high, but I see other models are speced up to 2500. Am I missing somthing?
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Unread 09-08-2007, 01:08 PM   #6
Uncle Russ
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It's my understanding that your engine should fast-idle until the engine warms up and then it should slow down to the 680-780 rpm spec.
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