Truck wants to die at stops and when shifting from reverse to drive?
I have a 2003 dodge ram 1500 slt 4*4 off-road 5.7 165k Hemi and it wants to die at stops. I can be driving at low speed and press on the gas and it will surge the rpm when barely pressed speed around 30 mph or so. It will lop its idle sometimes when first started like its starving for fuel then it will mellow out again. When I put it in reverse the rpm drops to 400 or less and back to drive usually while turning the wheel it will almost die then surge and run fine. It's worse when reversing up a incline. No codes present once had a o2 come up and went away which prompted the purchase of 2 new ones.
New throttle body, IAT, Spark plugs, clean and free PCV valve, K/N air filter , new downstream 02 up stream is stuck going to weld in another soon,.
Coils? Transmission sensor? Fuel pump? Fuel filter ? Gas cap ? Reprogram ECU or transmission ? TSB covering this ? It's got to be something easy . HELP