Lifan 620. Manual — part 23

Table 1-71 (Continued)

S/N Operation Test

Results

Actions

Yes

Next step

10

Check if the ignition sequence and timing of the

engine can meet with the standards.

No

Check and repair ignition

timing

Yes Diagnosis

help

11

Connect the electronic injection system adapter.

Turn on the ignition switch. Check the power supply

of the pin 12#, 13#, 44#, 45#, 63#. Check the

Check and repair relevant

1

2

3

4

way for carbon deposition.

No Next

step

Yes

Remove the trouble

5

Remove the fuel injector. Check the fuel injector for

leakage, blockage or abnormal flow with a special

fuel injector cleaner & analyzer.

No Next

step

Yes Replace

fuel

6

Check the fuel for normal operation.

No Next

step

93

Table 1-72 (Continued)

S/N Operation Test

Results

Actions

Yes

Remove the mechanical

troubles for the engine

7

Check the pressure for each cylinder of the engine.

Are they great different?

No Next

step

Yes Next

step

8

Check if the ignition sequence and timing of the

engine can meet with the standards.

No

Check and repair ignition

9

1

2

3

body, idle speed regulator, and idle speed by-pass

air way for carbon deposition.

No Next

step

Yes Replace

sensor

4

Disconnect the coolant temperature sensor, and

start the engine. Check the engine under warm-up

for unstable idle speed.

No Next

step

94

Table 1-73 (Continued)

S/N Operation Test

Results

Actions

Yes

Remove the trouble

5

Remove the fuel injector. Check the fuel injector for

leakage, blockage or abnormal flow with a special

fuel injector cleaner & analyzer.

No Next

step

Yes Replace

fuel

6

Check the fuel for normal operation.

No Next

step

7

8

1

way for leakage.

No Next

step

Yes Next

step

2

Check the spark plug for each cylinder. Check if its

model and gap can meet with starndards.

No

Adjust or replace

Yes Wash

relevant

parts

3

Remove the idle speed regulator. Check the throttle

body, idle speed regulator, and idle speed by-pass

air way for carbon deposition.

No Next

step

95

Table 1-74 (Continued)

S/N Operation Test

Results

Actions

Yes Replace

sensor

4

Disconnect the coolant temperature sensor, and

start the engine. Check the engine under warm-up

for unstable idle speed.

No Next

step

5

6

7

8

96