3. Difficult to start after warm-up
Common trouble location:
1. Fuel with water; 2. Fuel pump; 3. Coolant temperature sensor;
4. Fuel pressure regulator vacuum pipe; 5. Ignition coil.
Diagnosis Flow
Table 1-69
S/N Operation Test Results Actions
Yes Next step
1
Connect the fuel pressure gauge (the connection
point is the front end of the intake pipe of the fuel
distribution pipe assembly), and start the engine.
Check if the fuel pressure of the engine under full
working condition is about 350kPa.
No
Check and repair fuel
supply system
Yes Next step
2
Draw out the wire of one of the cylinders, and connect
with the spark plug. Keep the electrode of the spark
plug about 5mm from the engine body. Start the
engine, and and check if the blue white high voltage
fire is produced.
No
Check and repair ignition
system
Yes Replace sensor
3
Disconnect the coolant temperature sensor, and start
the engine. Is it OK? Connect a 300Ω resistance in
series at the connection point of the coolant
temperature sensor to replace the sensor, and start
the engine. Is it OK?
No Next step
Yes Check, repair or replace
4
Check the fuel pressure regulator vacuum pipe for
looseness or leakage.
No Next step
Yes Replace fuel
5 Check the fuel for normal operation.
No Next step
6
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 grounding of
the pin 3#, 51#, 53#, 61#, 80#. Are they OK?
Yes Diagnosis help
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