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12.13. Engine Revolution Speed is too Low or Flameout
Yes Remove the failure displayed 1 Put the ignition switch to “ON”. Use a failure diagnostic tester to check if any failure information record exists. No Next step Yes Next step 2 Check the air cleaner and look if it is open.
No Replace Yes Next step 3 Run the engine at idle speed and check if the engine revolution speed is normal at idle speed.
No Next step, overhaul with reference to idle speed failure entries Yes Next step 4 After starting successfully, check if air intake consumption of the engine at idle speed is around 300Kg/h (remember to check if cylinder pressure is normal). No Overhaul Yes Next step 5 Let engine run at idle speed, after coolant temperature reaches normal value, then use a diagnostic tester to check if ignition advance angle of the system is normal. No Check other systems Yes Next step 6 Connect fuel manometer valve. Short 30# and 87# pins of fuel pump relay to make the fuel pump run, and then check if fuel pressure is around 400kPa. No 10 Yes 9 7 Use a special joint to directly provide a 12V power supply and intermittent ground wire from battery to injector and check if the injector can work intermittently. No Next step Yes Next step 8 Clean out the fuel injector and look if it can work correctly.
No Replace fuel injector Yes Replace fuel 9 Check if fuel is bad or moisture. No 15 Yes Next step 10 Check if the fuel pressure value is below 350 kPa.
No 14 Yes Next step 11 Close the fuel manometer valve. Re-engage the ignition switch to let the fuel pump run for a period of time, and then check if fuel pressure can be built up. No 13 12 Open the valve of fuel gauge and clamp the oil return pipe by oil return baffle so that the oil can Yes Replace fuel pressure regulator |