1999 Ford Mustang V6 - 3.8

The car has a terrible vibration that shakes the whole car at idle or with the increase of throttle I unplugged the idle air control valve which made the motor idel down to almost killing it and at that speed the vibretion almost went away
the service engine soon light would not come on but it was a bad bulb after replacing it the light was still off so I unplugged about 6 sensors finally the light came on after running the codes only the throttle posision sensr code appeared
the first thing I did was replace the motor mounts they were weak but not broken and that was not the problem
thank you for any help