Can't Get Enough
Join Date: Sep 1999
Location: Cotopaxi, Colorado
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Re: 80 cj carter starvation??
First make sure that all of the ignition is correct, and the engine is warm.
Then, remove all of the variables. That means to pull the p.c.v. valve from the valve cover, and let it draw fresh air. This eliminates any problem with fuel dilution in the oil. Then pull the purge control line from the charcoal canister and plug it. This eliminates any problems with fuel saturation in the canister.
Then set the mixture screws to the highest rpm. Next, set the curb idle speed 10% over spec. That means that if the curb idle speed calls for 700 rpm, set it to 770 rpm. Now re-set your mixture screws to the highest rpm again, to be sure, and re-trim your base idle screw to the 770 spec. Now turn in (lean) the idle mixture screws until your 700 rpm spec. is meet. This is called lean drop, and can be verified with a propane enrichment tool. Now, hook up the pcv and charcoal canister, and re-trim your base idle speed. Now you can follow the data tag for choke idle speed adjustments.