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Unread 04-25-2012, 07:32 PM   #16
Registered User
1989 YJ Wrangler 
Join Date: Oct 2011
Location: Stevens Point, Wisconsin
Posts: 284
In this "WEBER" 32/36 DGEV, I do not see the idle fuel hole that is regulated by the mixture screw. I beleive it is in the I.D. on the flange of the throttle bore.
Why do you ask?
uptillnow- what is the "I.D. on the flange of the throttle bore". I apologize but I'm not sure exactly what that is.

I ask because I have turned the idle speed screw in 1.5 turns after losing contact with the throttle stop, taken the carb off, turned it over and saw that the plate wasn't even close to exposing the enrichment holes. I had to go 3 full turns in to even begin to expose them. So I need to figure out 1) Why is my brand new carb out of spec? and/or 2) Where does my idle speed screw truly belong because my carb IS out of spec.

Long story long, I want to make sense of these holes and what they do, because my Jeep actually acts as though it is getting NOTHING from the idle jets (which are brand new but also made sure were clean). I am always getting some amount of vacuum at the S port which I am told should be at zero during idle, and as soon as I turn out the idle speed screw even an 8th of a turn and try to have her idle she dies immediately NO MATTER WHERE the mixture screw is. Literally if I'm holding it at 2000 rpms and let go of the throttle it doesn't even burp on the way down it just dies IMMEDIATELY like I turned off the key. I just put on a new intake and exhaust manifold gasket to spec and the egr is sealed off with a machined flat steel plate. The only place left for a vacuum leak I think would be at the carb base, which is torqued to spec, except for vacuum lines that I have plugged at the source when trying to tune the carb.

I am just beside myself for why she won't idle properly at all, 30k miles on an 89 YJ!!!!! When I'm going down the road it drives like it only has 30k, nice and smooth, everything is mint about the way it runs except for the D#$@ idle.


Thanks, bluedaffy

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Unread 04-25-2012, 07:56 PM   #17
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1987 YJ Wrangler 
Join Date: Mar 2008
Location: corpus christi, texas
Posts: 6,958
id is inside diameter
I don't feel like working on anything, at this time.
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Unread 04-29-2012, 07:16 PM   #18
Registered User
1989 YJ Wrangler 
Join Date: Oct 2011
Location: Stevens Point, Wisconsin
Posts: 284
I just don't understand why it won't idle TRULY at all!!! not even a burp or a stumble when I back the idle screw out to the point of no vacuum reading at the "s" port. Anybody?
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carb , weber

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