well saturday i was speaking with someone about my tps sensor that went bad. well i changed it and it idles great, throttle response its 10 fold, and acceleration 10 fold.
well now my problem is after i let off the gas between 1500 and idle(800) rpm the motor shakes like all holly heck. and you can fell it throught the whole car. well i flashed the computer and there are no codes stored. could this just be something stupid like a fowled plug?? i just changed them not long ago though. any ideas???

No idea if your car suffers bad harmonic balancers like we do...but it might be starting. Check the rubber for cracking and whatnot

A harmonic balancer won't cause shaking, just rattling noises.

Use the procedure in the FSM or Chilton'* #28200 to adjust the TPS. Or get a scantool on it to see if the TCC is disengaging when requested.