I have a chevy 1500 5.7 liter,When you start it it runs a little rough,but will idle.When you put it in gear(automatic)it dies start it back up it will run till you go forward or backwards.I unplugged the map sensor and it runs like a whole different truck but it triggers the engine light.The engine light was not on till i unplugged it.Recent tune up cap,rotors,plugs,wires.Any advice??
