Troubleshooting

• Starter works but engine does not start
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Are all hose lines attached? Are these lines in proper condition?
  • Step 4: Is the fuel pressure correct?
  • Step 5: Is the cold start valve in the proper condition?
  • Step 6: Is the thermo-time switch in proper condition?
  • Step 7: Is the auxiliary air device in proper condition?
  • Step 8: Is the air intake system leak-tight?
  • Step 9: Is the air-flow meter in proper condition?
• Engine starts but then dies
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Is the fuel pressure correct?
  • Step 4: Is the start valve in proper condition (no leaks)?
• Rough idle, idle speed and exhaust test
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Is the throttle valve closed?
  • Step 4: Is the throttle valve switch set correctly?
  • Step 5: Can the idle speed not be corrected with the idle screw?
  • Step 6: No leaks in air intake system, system in proper condition?
  • Step 7: Does the auxiliary air valve close?
  • Step 8: Is the start valve in proper condition (no leaks)?
  • Step 9: Are the fuel injectors in proper mechanical condition?
  • Step 10: Is the fuel pressure correct?
  • Step 11: Is the air flow meter in proper condition?
  • Step 12: Adjust exhaust CO level
• Fuel not accepted smoothly
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Is the throttle valve switch set coorectly?
  • Step 4: No leaks in air intake system, system in proper condition?
  • Step 5: Is the auxiliary air device in proper mechanical condition?
  • Step 6: Is the air flow meter in proper mechanical condition?
  • Step 7: Is composition of exhaust gas (concentration of CO) correct?
• Consistent engine misses
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Are the wiring harness plug connections in proper condition?
  • Step 4: Is the voltage supply for the fuel injection system in proper condition?
  • Step 5: Is the start valve in proper condition (no leaks)?
  • Step 6: Are the alternator and regulator in proper condition?
  • Step 7: Is the quantity of fuel delivered by the fuel pump correct?
  • Step 8: Is the quantity of fuel delivered by the injectors correct?
  • Step 9: Is the air flow meter in proper condition?
  • Step 10: Is the control unit in proper condition?
• High fuel consumption
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Is the fuel pressure correct?
  • Step 4: Is the quantity of fuel delivered by the injectors correct?
  • Step 5: Is the start valve in proper condition (no leaks)?
  • Step 6: Is the air flow meter in proper condition?
  • Step 7: Is composition of exhaust gas (concentration of CO) correct?.
  • Step 8: Is the altitude compensator functioning correctly?
• No maximum power
  • Step 1: Is ignition system in proper condition?
  • Step 2: Is engine in proper mechanical condition?
  • Step 3: Does the throttle valve open completely?
  • Step 4: Is the fuel pressure correct?
  • Step 5: No leaks in air intake system, system in proper condition?
  • Step 6: Is the quantity of fuel delivered by the fuel pump correct?
  • Step 7: Is the air flow meter in proper mechanical condition?