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post #1 of (permalink) Old 11-05-2002, 08:22 AM
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Fuel problem with my CJ-5

I have an 81 CJ-5 with a 258, Weber 38 with mechanical fuel pump. I have had a strange problem a couple of times now and I'm cornfuzzed.............when the jeep sits in the garage for about a week it won't start. The first time this happened, I cranked it for about 10 minutes. After I removed the air filter and primed the engine with gas, it started right up and died. I primed it again and it ran fine.

Last night I had the same problem. I removed the fuel filter and there was no gas. I cranked the engine a couple of times and it started pumping gas. The only other thing I did was I loosened the gas cap and retightened it. After I reinstalled the fuel filter I cranked it a few seconds and it started right up.

I'm wondering if one of the vents is plugged and a vacuum is forming in the tank. Then when I park it sucks the gas out of the line and back into the tank..any other ideas?

Thanks in advance.....
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post #2 of (permalink) Old 11-05-2002, 09:04 AM
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Re: Fuel problem with my CJ-5

My guess... a bad fuel pump.

The Vents, if plugged should not prevent the fuel pump from moving gas.
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post #3 of (permalink) Old 11-05-2002, 08:46 PM
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Re: Fuel problem with my CJ-5

I always thought it was the carb that wouldn't hold fuel. If the carb had fuel in it, he should be able to get it to start long enuff for the fuel pump to catch up........
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post #4 of (permalink) Old 11-05-2002, 09:33 PM
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Re: Fuel problem with my CJ-5

I've read here that the gas in the float bowl evaporates because of the open-air filter. Mine has a leak on the top of the bowl and will do this after 2 days. I've got a can of starter fluid that I use when I need it. You might try some gasket sealer on the top gasket. I would also replace the fuel pump if you haven't. For $15 bucks why not?
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