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
