My buick will try to die on me when i have idled it for a little bit i can drive it but when i let off the gas it wants to go craxy and try to die on me i have changed fule pump cam sensor fuel filter alternator wires plugs anyone have a clue whats going on here

Try changing or clean your EGR valve and try it.

The EGR is a good bet, but also consider a new Air Filter and maybe run some Rislone through it during a hard run.

My bet is on the EGR too, those can be a pain...

Good Luck!

:)