Exhaust backfire with FLAMES?? HELP!!

InternationalHarvester7.3 · #1 (**permalink**) 11-21-2012, 06:43 PM

Alright I have a 96 with around 289,xxx miles and I just put a stack on it and I was driving down the road going about 75 or 80 and let off the pedal and when I pressed it down again it backfired and blew a flame about 5 foot out my stack and scared the piss out of me and everyone around me.. So what is the cause of this and how can I stop it because about had a heart attack. So if anyone knows what this is please help.

InternationalHarvester7.3 · #2 (**permalink**) 11-21-2012, 07:06 PM

And the truck is stock with a DIY Intake..

95Strokeee · #3 (**permalink**) 11-24-2012, 07:57 PM

Maybe exhaust valves are sticking open? Hard to say

Sent from my iPhone using AutoGuide.com App

rolsmojave3 · #4 (**permalink**) 11-26-2012, 08:11 AM

I've had this happen and could duplicate it. Turned out to be the UVCH shorting out.

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