Start Failure Of The Engine - Lifan 620 Maintenance Manual

2. Start failure of the engine

Common trouble location:
1. No fuel in the tank;
4. Ignition coil;
S/N
Connect the fuel pressure gauge (the connection
point is the front end of the intake pipe of the fuel
1 distribution pipe assembly), and start the engine.
Check if the fuel pressure of the engine under full
working condition is about 350kPa.
Connect the electronic injection system diagnostic
instrument, and check the rotation speed of the
2
engine. Start the engine, and check if there is rotation
speed signal output.
Draw out the wire of one of the cylinders, and connect
with the spark plug. Keep the electrode of the spark
3
plug about 5mm from the engine body. Start the
engine, and and check if the blue white high voltage
fire is produced.
Check the pressure of each cylinder of the engine.
4
Check if the pressure is enough.
Connect the electronic injection system adapter. Turn
on the ignition switch. Check the power supply of the
5
pin 12#, 13#, 44#, 45#, 63#. Check the grounding of
the pin 3#, 51#, 53#, 61#, 80#. Are they OK?
www.CarGeek.ir
2. Fuel pump; 3. Rotation speed sensor;
5. Mechanical part of the engine
Diagnosis Flow
Table 1-68
Operation
89
www.cargeek.ir
Test Results
Yes Next step
Check and repair fuel supply
No
system
Yes Next step
Check and repair rotation
No
speed sensor line
Yes Next step
Check and repair ignition
No
system
Remove the mechanical
Yes
troubles for the engine
No Next step
Yes Diagnosis help
Check and repair relevant
No
line
Actions