New injectors, sensors, etc. try doing the ECU "hard reset" procedure below. It clears the codes back to factory and starts from scratch with the ECU:
Clearing error codes and removing residual memory
1. Disconnect the POSITIVE battery terminal and touch it to ground for 30 seconds. (This is to discharge the PCM capacitors, which maintain the Adaptive Memory. 2. Reconnect the Battery Cable 3. Turn Ignition Switch to the "ON" position but DO NOT start the engine 4. Turn Headlight "ON" 5. Turn Headlights "OFF" 6. Turn Ignition Key "OFF" The PCM Adaptive memory has now been flashed, or erased from the PCM.