I have a '95 GT that is acting weird on me. Turns over easy from cold crank. Accelerate...about 20 mph things get weird.  Pedal's down but no power, engine revs 3000, 3500, 4000 no power.  Auto trasmission sluggish to shift.  Car warms up shifting seems normal but still no power. Check engine light comes on and goes off and things cycle again. Diagnostic has been ran and the computer will not communicate.  Is this a specific type of problem that someone else has had?