Lifan 620 Maintenance Manual page 102

S/N
Check the spark plug for each cylinder. Check if its
5
model and gap can meet with starndards.
Remove the idle speed regulator. Check the throttle
6 body, idle speed regulator, and idle speed by-pass air
way for carbon deposition.
Check the intake air pressure sensor, throttle position
7
sensor and the lines for normal operation.
Remove the fuel injector. Check the fuel injector for
8 leakage or blockage with a special fuel injector cleaner
& analyzer.
9 Check the fuel for normal operation.
Check if the ignition sequence and timing of the engine
10
can meet with the standards.
11 Check the exhaust pipe for smoothness.
Connect the electronic injection system adapter. Turn on
the ignition switch. Check the power supply of the pin
12
12#, 13#, 44#, 45#, 63#. Check the grounding of the pin
3#, 51#, 53#, 61#, 80#. Are they OK?
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Table 1-78 (Continued)
Operation
101
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Test Results Actions
Yes Next step
No Adjust or replace
Yes Wash relevant parts
No Next step
Yes Next step
No Replace sensor
Yes Remove the trouble
No Next step
Yes Replace fuel
No Next step
Yes Next step
Check and repair
No
ignition timing
Yes Next step
Repair or replace
No
exhaust pipe
Yes Diagnosis help
Check and repair
No
relevant line