WP13 Diesel Engine Series Operating Manual
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Use a tool to dry the connectors and then start again.
Note: an accelerator of the same type should be needed in time of replacement.
6.2.5 Engine hunting during Idling
◆
Reason and troubleshooting of engine hunting:
①
The fuel injector is not working normally: check the fuel injector and wiring harness of each
cylinder
②
The complete vehicle equipped with speed sensor will have input of speed signals in time of
parking: check the speedometer and speed sensor signals and wiring.
③
The fuel is poor in quality with water or wax: clean the fuel system and replace the fuel filter.
④
The low-pressure fuel way suffers from air invasion: check the fuel pipe and joint tightness,
and exclude the air;
⑤
The fuel injector atomization is instable: check and repair
Note: the idle speed rise due to the low water temperature is the normal function of the ECU.
When any other load (for example, the air-conditioner is started) is applied, the idle speed will
naturally increase by 100 rpm.
