white smoke..

[Strokeorcroak]

heres some background:
I got a TW tunes 2 weeks ago, put them in and noticed the truck seems starved, when i really get on it in the hotter settings it stutters and shakes before picking it up and seems kinda underpowered....

I keep the chip in and continue driving it for like a week and now when its cold if i put my foot to the floor its like nothing happens, i have very little throttle response when its cold!!!

THEN this morning i go out to start it and i crank it for about 8 seconds and it doesnt fire (it usually fires EASILY no matter what temp. in like 2 sec)
so i let off and try it again, it starts but i get a white puff of smoke out of the tail pipe....
Any ideas??? I am hooking to an AE today to pull codes....

[Strokeorcroak]

any techs or anyone?? somebody that is very good with the 7.3's