Can't Get Enough
Join Date: Sep 1999
Location: Cotopaxi, Colorado
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Re: No Fuel into the carb????????
You need to check fuel pump pressure and volume. You can check pressure at the small return line on the fuel filter. It should have 4 to 7 lbs pressure, and hold pressure after you quit cranking. If it dosn't, and you don't have any leaks on the pressure side, the pump is bad. If it is in specs, do a volume test.
To properly check volume, it should be done at the return line with the engine running. Specs are something like 1 pint in 20 seconds. If the volume is low, or the engine dosn't run, then do the bottle check. This is done at the pressure side from the pump. When you put the hose in a bottle, use a clear container. Crank the engine over until the fuel comes above the hose. At this point, watch for bubbles. If you get bubbles, and volume is low, it usually means that you are sucking air. That means that there is a leak on the suction side. CJ's are notorious for sucking air at the lines coming from the sending unit, so you may just want to replace them for principle.