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GENERAL INFORMATION
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end of it.
Note the following:
a. If there is no visible fuel on the end of the spark plug, go to check whether the fuel valve, oil
injector or fuel hose is clogged.
b. If the spark plug at the bottom of a fuel. And the engine has spark. Check for an excessive
intake air leak or the possibility of contaminated or stale fuel.
NOTE
If the UTV was not used for some time. And was not
properly stored. The fuel may have gone stale.
Where lighter parts of the fuel have evaporated.
Depending on the condition of the fuel. a no-start
condition can result
c. If there is too much fuel on the end of the spark plug, go to check whether there is overflow at
the air filter or the ducting damper.
Rich Mixture
The following conditions can cause a rich air/fuel mixture:
1. Air pressure sensor, oxygen sensor, solar term door position sensor fault
2. ECU program error or damage
Lean Mixture
The following conditions can cause a lean air/fuel mixture:
1. The injector is clogged
2. The pump pressure is not enough
3. ECU program chaos
4. ECU damage
5. The pressure sensor, oxygen sensor, solar term door position sensor fault
ENGINE
Engine Smoke
The color of engine smoke can help diagnose engine problems or operating conditions
Black smoke
Black smoke is an indication of a rich air/fuel mixture
Blue smoke
