Have you learned any more about the stalling? Our 96 tacoma 2 wheel drive, manual trans. does something similar so we are looking for solution also. Both o-2 sensors have been replaced, thought it was fixed, then it shut down again on freeway after traveling around 55 miles from home. So now trying to track down the endless switches and sensors that could be related. This truck has high mileage too, even trying to do own repairs, these little sensors and things are very expensive. Any suggestion appreciated.