94 Cutlass Supreme engine cuts out

94 cutlass supreme with 3.1 engine will start and rev in neutral. Once in drive, engine will cut out intermittently. Tach will drop to zero and return to rpms or will cut out completely. I have replaced the cam and crank sensors, fuel pump, fuel filter, map sensor, fuel pump relay and ECM. Anyone have any ideas as to where i can go from here. Thanks

Try disconnecting the TCC solenoid wire from the TCC solenoid itself.

Check this link out. http://www.v6z24.com/howto/tcc

It should be pretty much similar to your vehicle. Just disconnect the TCC solenoid wire and test drive the vehicle.