[shanestan]

Well I spoke too soon. The car continues to not shift properly (intermittently). Shifts too early and will not down shift properly when coming to a stop. I have replaced the MAP sensor, and doublechecked spark plug wires, one was not all the way on. It seemed to help at first but it started back to sputtering. I bought the car from a one time owner (retired Army) and the car is completly stock. Engine is a 4.3l TBI with a 2004R transmission. Ujoints have been replaced. Most of the vacuum lines have been replaced. Sometimes when the car is idling (idle is smooth) the check engine lite comes on but goes off after driving away. The code points to the MAP sensor but even after being replaced, it will still come on which points to a vacuum problem. This happens with the A/C on and off. Either the engine is not producing enough power at idle to keep fluid pressure in tranmission at proper level or the tranmission is pump is dying. Any other suggestions?