I would first check the power connections to the coil. They have a
crappy Ford coil connector that gets corroded out easy.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

JD wrote:
>
> Got a 90 wrangler with a 4.2 5 speed. Seems to backfire when driving. The
> motor dies out, but if you feather the throttle you can keep it going but it
> backfires bad..... Any suggestions??
>
> TIA
>
> John