Strange stumbling
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Joined: Oct 2015
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Strange stumbling
Have a 5.8 1990 F250 5 speed. Truck runs great but stumbles when I add amps to the system. I put the heat on high and it stumbles tach gets jumpy. During the day truck seems fine but at night with lights and radio getting this odd stumbling. Recently a mechanic put a dizzy, plugs and a new battery. The battery looks small to me so wondering if having a crappy battery might be the issue not enough juice? or they used a bad dizzy. Any ideas? Bad ground somewhere? bad coil when a load is on it as that bench tested ok
More Turbo
Joined: Dec 1999
Posts: 582
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From: New Orleans United States
Maybe a bad ground issue? My dad's 95 has a loose/corroded negative battery cable and the engine would kill when you turned on the headlights and hit the brakes. New cable and some protective grease on the terminals and all was well.
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Haven't chased the positive bat cable yet but will do the neg is new. def seems like an electrical problem it's a quick slight stumble. Im going to swap the coil tomorrow and check plug wires and plugs. I hope its not a mouse eaten ground somewhere as the truck is mint no rust once I get it running right want to paint it. Have a feeling it's the new dizzy the parts these days are all crap quality and hard to find the OEM stuff
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