Gains power on park or neutral. Hesitate to go

05 Magnum. Gas pedal is wiggly I need it to be disconnected from wired sensor in order to speed but no higher than 30 mph on a good day. I move steering wheel adjuster to gain power and speed up. When I park it or come to a stop. I put it on Neutral to drive it when it's my turn to go. Goes faster in bumpy roads or alleys. Takes forever to move once out of park. Goes faster when I turn the wheel. The more I turn the more power it gains. Throttle won't read gas pedal if hooked. Once hooked on to wiring. The car won't go more thann 5mph