Cannot get Chevy 1500 p/u 5.7L engine to run smooth without dying out in gear

When starts up, it bogs down, will run but bogs, when driven down the street it bucks, doesn’t kick in & run smooth – it doesn’t die out.  Unplugged the temperature sensor & runs better but kicks up to a high RPM & still bucks if drive down the road.  Has no back-fire.  Rebuilt the throttle body, replaced the fuel filter.  Replaced cap rotor wires & runs better but dies out in gear, can run it down the road but have to feather the gas to keep it from dying out.