My son has a 93 eclipse 2.0 nt auto that runs great when its cold. Once it reaches operating temp it has no power and shutters badly. If I put it in drive with foot on brake and give it gas the tach drops to 500 and the car shakes lighting CEL. Once back in neutral when I rev the motor the CEL goes out and motor idles fine. The car only has 70k miles on it and runs great when cold. Any ideas would be very welcome. This is a non-california car.
Thanks