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post #1 of (permalink) Old 03-14-2001, 06:54 PM Thread Starter
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jeep engine cutting out

Here's an interesting gremlin that popped up. '82 CJ7 with 258 and weber carb. Drives fine around town, even when floored. On the highway, once under continous load (like going up hill), the engine starts cutting out and feels just like it is running out of gas. If I push in the clutch and let it coast for a few seconds, it'll then run again for a moment before bucking again.

It was running fine for a week, then this problem just started.

Last week it broke down and I determined it was a bad fuel pump. I replaced it as well as the fuel filter. Maybe my new pump is at fault... is there a test for it?

I even vice-gripped closed the return line from the filter (the third hose coming out) which didn't help.

I'm thinking it's a fuel starvation problem, but then why does it run just fine at full throttle at low speeds? My next step is to take the carb apart and look for dirt or a low fuel float.

Any ideas? Maybe the ignition box is going crazy?

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post #2 of (permalink) Old 03-14-2001, 07:22 PM
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Re: jeep engine cutting out

sounds to me like your float is set for too low a level, or if the float is one of those black plastic looking things, it may be porous, and the fuel being soaked up by the float causes it to only get up to a certain level. i had that happen to me a bunch of years back. either way, the reason it does it under load, is that you are burning fuel at a faster rate than at the same throttle position level with no load.

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post #3 of (permalink) Old 03-15-2001, 12:29 AM Thread Starter
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I fixed it!

After talking with my dad on the phone, he suggested checking the fuel filter in the gas tank. sure enough, it was collapsed over the fuel intake. Works great now!

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