[bwood]

A few things come to mind:

-Is the timing correct?
-Conditions of timing components (cap, rotor, gear, chain/gears)
-Is fuel pressure staying up when the pedal hits the floor
-I wonder if the MAP sensor is responding quick enough when the vacuum drops and telling the ECM what going on to compensate with fuel/timing
-Same for the TPS voltage
-Possible flow issue, kinked/deteriorated/dented fuel line
-If it only happens in gear, I wonder if it might be the adjustment of the TV cable
-Again, happens in gear only, is the TCC engaging too soon or not disengaging correctly


How long has this been happening? If it has been since you can remember, I wonder if the Torque converter has been changed to a very low stall and the engine can't get the revs up to get into the power range?