I have a 94 dodge 3500, 5 speed, it chugs at an idle sometimes, also when i drive it and take off it chugs, plus when i slow down for a stop sign and let it idle then take back off, it chugs like it has air in the fuel. Sometimes it gets bad enough it stalls out on me and will not restart unless i snuff it with ether. I have already have put on an injection pump, injectors, new lift pump, new fuel filter, and new sending unit in the tank. Also, i pressurized the fuel lines and no leak found there either. I am out of ideas! Need help please!!!!