Troubleshooting Hints
- If the engine is hard to start when hot, check for fuel pressure and injector leaks.
- If the injectors do not operate when the engine is cranked, then check the following:
- Defective power supply circuit to the ECU, faulty ground circuit
- Defective control relay
- Defective Crankshaft Position (CKP) Sensor or Camshaft Position (TDC) Sensor
- If there is any cylinder whose idle state remains unchanged when the fuel injectors are cut one after another during idling, check for the following items about that cylinder.
- Injector and harness
- Ignition plug and high tension cable
- Compression pressure
- If the injection system is OK but the injector drive time is out of specification, check for the following items.
- Poor combustion in the cylinder (faulty ignition plug, ignition coil, compression pressure, etc.)
- Loose EGR valve seating