Thank you for the donation.
When the D4 light comes on, does it go off if you restart the engine?
Did you try to retrieve for trouble codes?
Since the TCM was replaced 3 times, the possibility of it being the cause is rather low, unless there are changes in the symptoms.
I would lean more towards a bad connection somewhere.
Test the Throttle Position Sensor to see if it is working within specs.
Tuesday, April 27th, 2010 AT 7:27 AM