Acceleration/throttle hesitation-surge on MC2100 - Off-Road Forums & Discussion Groups
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post #1 of (permalink) Old 09-17-2002, 11:55 AM Thread Starter
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Acceleration/throttle hesitation-surge on MC2100

I have an 84 CJ7 (258) with the MC2100 that has recently developed somewhat of a hesitation when I press down on the accelerator. It hesitates and then surges forward. This occurs most notably when starting in 1st gear from a dead stop. At highway speeds it seems fine and shows no other signs of problems. This is a recent rebuild so I would be surprised if this is the problem but who knows. Also, the fuel filter was just replaced as I thought that might be the source of the problem and the fuel pump (mechanical) is recent as well.

Any ideas on what to look at. I almost broke my nose on the windshield earlier today trying to get a 'junp' on a green light.
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post #2 of (permalink) Old 09-17-2002, 12:58 PM
 
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Re: Acceleration/throttle hesitation-surge on MC2100

make sure the accelerator pump diaghpram is working.

with engine off, look down carb, open the throttle quickly, it should squirt fuel in the opening.

id also suspect the ignition timing, try advancing it until it pings, then back it off some to stop the pinging( plus alittle more for the pngs you cant hear)

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