the problem im having with my truck ,is when the truck warms up[only when its warm], when u put it in gear reverse,or drive and hold your foot on brake,like at a stop light the truck takes a few seconds but then starts to miss,shake goes away for a couple seconds and then keeps on doin it but never stalls,it wont do it if its in nuetrual or park. when i go to take off with truck from a stop, is starts breaking up,pooping and backfires a couple times but then clears up higher in the rpms and then drives fine until i go to floor it again or come to stop, no smoking and oils clean and oil press is 40-45psi
i replaced so far and no changes
new gas tank\no dirt or rust
new fuel pump,screen[filter in tank]
new inline fuel filter 3times in past month\all new gas lines
cut catalyic converter out and put stright pipe\brand new muffler
new spark plugs
wires/almost brand new
new cap\rotor
new map sensor
new egr valve\cleaned out manifold where sets in
new egr valve selonoid
rebuilt tbi [all new gaskets]also trhottle body base gasket
new pcv valve
new coil
replaced ground from block to frame\was broken
new idle air control sensor
new coolant temp switch
replaced all new vacum lines on manifold/thottle body