Table 1-78 (Continued)
S/N Operation Test Results Actions
Yes Next step
5
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
6
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
Yes Next step
7
Check the intake air pressure sensor, throttle position
sensor and the lines for normal operation.
No Replace sensor
Yes Remove the trouble
8
Remove the fuel injector. Check the fuel injector for
leakage or blockage with a special fuel injector cleaner
& analyzer.
No Next step
Yes Replace fuel
9 Check the fuel for normal operation.
No Next step
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 Next step
11 Check the exhaust pipe for smoothness.
No
Repair or replace
exhaust pipe
Yes Diagnosis help
12
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?
No
Check and repair
relevant line
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