1998 Chevrolet Camaro car starts and idles fine, revs up when given fuel with out hesitation

1998 Chevrolet Camaro mileage: 149,000. I have replaced the O2 sensor, ECM, map sensor, throttle position sensor, checked all wires for shorts or grounds, all vacuum hoses and around intake for vacuum leaks. The car starts and idles fine, revs up when given fuel with out hesitation. Put the vehicle in gear and everything is fine, but as soon as the car moves from its position, even coasting a foot it shuts completely down. I have run diagnostics, and the codes I receive are for the parts I have already replaced, 22 and 34.