Lifan 620 Maintenance Manual page 97

S/N
Disconnect the coolant temperature sensor, and
4 start the engine. Check the engine under warm-up
for unstable idle speed.
Remove the fuel injector. Check the fuel injector for
5 leakage, blockage or abnormal flow with a special
fuel injector cleaner & analyzer.
6 Check the fuel for normal operation.
Check the pressure for each cylinder of the engine.
7
Are they great different?
Connect the electronic injection system adapter.
Turn on the ignition switch. Check the power supply
8 of the pin 12#, 13#, 44#, 45#, 63#. Check the
grounding of the pin 3#, 51#, 53#, 61#, 80#. Are
they OK?
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Table 1-74 (Continued)
Operation
96
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Test Results Actions
Yes Replace sensor
No Next step
Yes Remove the trouble
No Next step
Yes Replace fuel
No Next step
Remove the mechanical
Yes
troubles for the engine
No Next step
Yes Diagnosis help
Check and repair relevant
No
line