Yes, my truck backfired on me yesterday, funny story. Friday morning I cranked my truck up cold and it wouldn't catch. After the 3rd attempt it fired up and smoke poured out. Crap, glow plug problem. Thing is I didn't have time to fix it since I was getting ready to leave for the weekend, and I was hoping it was just a fluke since I replaced the GPR a month ago.

Yesterday morning I was camping with my family in Rocky Mountain National Park. At 7:00 in the morning I went to fire my truck up. First attempt, just cranked and cranked, smoke coming from the tailpipe, no starty. 2nd attempt, crank again, no starty again. Third attempt, turned the key, glow plug light was on, and KABOOM!!!! . Sounded like a cannon shot throught the entire campground. Turned the key again and this time it started up. The park ranger came by thinking that a propane tank had exploded, at least that's what they said it sounded like from across the campsite at the ranger station. I'm sure that was a nice alarm clock for everyone

Anyway, I'm home and this morning I hooked up my multimeter to the GPR and cycled the key on. Sure enough, my "new" GPR is acting up. It either doesn't come on, or when it finally clicks on, the voltage varies by quite a bit (6 to 11 volts). I've already checked my charging system and batteries. Everything works perfect there. All batteries and altenator are brand new as well. Looks like my glow plugs are working fine so far. I'll replace the GPR today and double check everything.

Just thought I would share my story with everyone.

 

thats pretty amazing. never heard of a powerstroke or any turbo diesel for that matter, backfire. it must have been the combination of heat, and the unburnt fuel in the tailpipe that ignited.

 

That's the only thing I can think of that happened, is that when I tried to crank it was spewing fuel in to the combustion chamber, and when I turned the key again there was just enough fuel + exhaust valve open + glow plug relay finally switched on = kablewy!