My 03 started acting up. It has 46000 miles. I was pulling a trailer and all of a sudden it was as if the ignition was turned off then back on and BANG with flames out the exhaust. I slowed down and it sounds normal not rough or missing. Then it happened three more times in the next twenty miles.

 

Ohh great, now just like all the smoke, the guy's on here are gonna be tryin to figure out how to make there truck cool and explode and spit fire out the rear end like yours.

 

Check your oil seals on the Turbo. Are they leaking oil into the exhaust side which is igniting every so often?

 

Usually when an electronic diesel engine backfires..It has something to do with a timing sensor. Were there any codes? I am a CAT mechanic... so this is just general info. I will be buyin myself a manual so I can be Cummins edumicated.

 

i never thought of it...but i guess a diesel could backfire? thought the fuel had to be under pressure w/ O2 present? at any rate WOW bet the turbo is like *** was that?

 

Just hook up a propane bottle to the exhaust and add a spark plug at the tip! Ohh wait, you are trying to get rid of the flames and pops...Can't help you there!