Difficult To Start
- Ensure vacuum hoses are not disconnected or damaged.
- Ensure electrical harness, connectors and wires are not broken or loose.
- Check voltage to ECU
- Check ECU operation.
- Check control relay operation.
- Ensure there are no codes in memory.
- Check fuel pump control system operation.
- Check that fuel pressure meets specification.
- Ensure ignition timing is correct.
- Check injector operation.
DIAGNOSTIC CHART FOR DIFFICULT TO START SYMPTOM
| Symptom or Component | Malfunction or Possible Cause | Action To Be Taken |
|---|---|---|
| Electrical System | Low Voltage, Broken Wiring, Poor Connection Faulty Relay or Pressure Switch | Check for at least 11.5V at battery. Check system and fuel pump relay. On Turbo models, check pressure switch. |
| Fuel Pump | Pump Not Working Or Poor Delivery | Check fuel pump delivery and flow. |
| Fuel System | Leakage, Faulty Fuel Pressure Regulator Blocked Return Line | Check for leakage. Check fuel line pressure. Check Fuel Pressure Regulator. |
| Induction System | Air system leakage | Check for leakage, downstream of throttle housing with pressure tester and visually between air mass meter and throttle housing. |
| Injectors | Opening, Duration Out Of Spec, Leakage | Using multimeter, check injector duration. |
| Temperature Sensor | Not Functioning, Break In Wiring, Poor Connection | Check sensor with multimeter. |
| ECU | Poor Connection, No Input Signals, Faulty ECU | Using multimeter, check all ECU input signals. |
| Auxiliary Air Valve | Malfunction Or Air Leak In Air Valve | Using multimeter, check air valve. |