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Discussion Starter #1
Hey, just got a new 5.9 tb for my 3.9, now i love the throttle response and the extra power, but the idle seems to be a little high, it used to idle at like 500 now its at like 1000. Now ive noticed that there is what seems to be an idle adjust screw, but there is some kinda cap over it so it cant be adjusted, is there any way to adjust the idle? I thought maybe if i took a dremel to the screw tip it might help but i dunno i wanted to ask for help first. any help is very much appreciated
thanx
 

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1,771 Posts
Reset your PCM and make sure you dont have any vacume hoses that you might have forgotten to reconnect. Also, did you clean you IAC valve that's located on the back of your tb? It might be dirty. Just take it out of the tb and spray some carb/tb cleaner on it. Might take a couple applications for it to knock off most of the carbon build up.
 
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