After-Burn

1. Defective ECU.
2. Open or shorted fuel injector circuit.
3. Stuck fuel injector.
4. Open or shorted manifold air pressure sensor circuit.
5. Broken or disconnected manifold air pressure sensor hose.
6. Defective manifold air pressure sensor.
7. Open or shorted coolant temperature sensor circuit.
8. Defective coolant temperature sensor.
9. Open or shorted throttle angle sensor circuit.
10. Defective throttle angle sensor.