Run the truck at night. Open the hood and watch for a spark jumping around. Found one on my 97 that was arcing on the spark plug. Replaced it and it worked great.

On my 88, I found my igniter case was leaking, and water would get in the igniter and short it out.

Get a bottle of water, and spray around on components to see what exactly triggers it.


88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride