Really rough idle, misfire and backfire

Having a really rough gulping like (lol) Idle and revs up on its own while in park. When put in gear it almost shuts off if I don't hit gas, and shuts off sometimes when braking to make a turn. While driving it has power loss barely wants to go and backfires the whole time. I have put a new Throttle body, MAF sensor, MAP sensor, EGR valve, new plugs and wires. Replaced air filter, checked wires everywhere, nothing has changed. When I put new spark plugs wires on it seemed like it got worse. Fuel pump comes on. Any Ideas would be greatly appreciated.