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post #1 of (permalink) Old 01-03-2002, 07:21 PM
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Engine Problem

Allright here's what's going on. I have a 1990 fullsize with the 302 in it. This problem seems to happen most often when i am offroading, but it also appears on the road. while i am underway either accelerating or moving at a constant speed, the engine will miss for 1-2 seconds, then come back. Sometimes it stalls. The check engine light usually comes on when this happens. I have noticed this only occurs when i hit a bump in the road. Even while driving on a smooth road if i hit a bump the engine will momentarily miss, and the light will come on. Sometimes the light will stay on until i turn the engine off. It's getting annoying cause i'll have high rpm's trying to navigate a trail, and i'll hit a bump and lose all the rpm's i had wound up. So, i was wondering what some possible reasons are for my truck doing this. As always, thanks for any input.


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post #2 of (permalink) Old 01-03-2002, 07:41 PM
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Re: Engine Problem

I've had a coil do that.
The windings were coming loose, and it would shut down over bumps just like you mentioned.
I swapped in a MSD Blaster High Vibration Coil....solved the problem.
However, I'd think you better "pull the codes".
I'm not much help there though, as I'm runing a carb.

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post #3 of (permalink) Old 01-04-2002, 12:59 AM
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Re: Engine Problem

Try running the engine in the driveway and shaking different parts of the wiring harness, esp. the big connector to the EEC thru the firewall against the L fender. It could just be a loose ground. The ground for the EEC is on the L fender at the core support.

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