OK...i have had the truck for 8 days, and yes this is my first go around with a diesel pickup, the truck will smoke blue for a little bit when first started. yesterday i was sitting at a stoplight and the truck started to "lope". like i lost an injector? or it is stuck open. if i drove mormal on the way home it was vibrating and choking....if i stood on it it would run sluggish for 15 or 20 seconds then take of like a raped ape and run great until i take my foot out of it. last night i was trying to get to my garage and the truck was going up a hill and started boggin...then died. sat for about 2 minutes started right back up great like nothing is wrong ran for 8 or 10 miles and did it all over again. after 2 or 3 minutes started right back up and barley made it to my shop. at idle the truck is loping like a monster cam and no whistle out of my exhaust that normally has ALOT of whistle...any idea where to look