Your engine is supposed to vibrate, just a little. But when the shaking gets harder to ignore, there’s probably something ...

QUESTION -- I own a 1996 Escort LX 1.9 automatic. The check engine light is always coming on and registers no codes. The transmission, sometimes when cold, does not shift until engine warms up, yet ...

First thoughts are that the stepper-motor (which controls the idle speed) is faulty. That would explain both the high idle at low engine temps and the stalling and stumbling as you roll to a stop.