Join Date: Nov 2000
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Re: stock carb in a 90yj
Take the carb off the manifold, take the top off the carb, remove the fuel inlet (needle and seat) to remove the float and blast out all passages with aerosol carb cleaner. You can remove the idle mixture screws as well and shoot carb cleaner thru those passages, but mostly clean out the float bowl to prevent recurring blockages, and blast out the passages in the bottom of the float bowl.
Tighten all bolts on the intake manifold to eliminate any vacuum leaks. Also consider unplugging the stepper motor (if legal in your area) and adjusting idle mixture screws by hand using a vacuum gauge for peak lean vacuum.
You might want to consider swapping in a Motorcraft 2100 carb. They idle really well. Need a cheap adaptor plate, open element air cleaner and some work on the throttle linkage. Get one from a 304 amc or 302 ford.
84 CJ7, 258, HEI, M/C 2100 carb, 5 inch lift, RS9000's, 33x12.5 BFG M/T's, Lockright, full cage & belts, Xenon flares, AMC 20 1pc axles, GM dual diaphragm brake booster