backfiring or missing

hi guys,
my truck sputters and backfires in all gears.for example if i am going down the highway and someone is going slow in front of me and i have to deccelerate just a little it backfires until i reach a certain speed. i have tried everything. pleease help me.

i have your answer email me at [email protected] as i can help you

did you ever get an answer to your question? i'm having a similar problem. "chunking along" whenever it gets cold/damp outside (doesn't do it in the summer time.