I just bought a 1990 mm with the 3.0l v6. I having a problem with it cutting up. I put brand new plugs wires distributor cap rotor button fuel pump fuel filter clean the injectors clean the IAC I've tested the i a c and throttle position sensor truck won't idle nice as soon as you hit the gas pedal it starts to choke up and if you let off the gas pedal just a little bit it'll rev up great any ideas