14. Poor acceleration
Table 1-64
S/N Operation Test Results Actions
Yes Repair
1
Check the clutch, tyre pressure, brake, tyre size and
four-wheel alignment for normal operation.
No Next step
Yes Next step
2 Check if the throttle can be fully opened.
No Replace or repair throttle
Yes Remove the trouble
3
Turn the ignition switch to ON. Check if there is
trouble information records with a diagnostic
instrument.
No Next step
Yes Next step
4
Run the engine at an idle speed. Check if the ignition
advance angle is normal after the coolant reaches
normal operation.
No
Adjust ignition advance
angle
Yes Next step
5
Turn the ignition switch to ON. Connect an adapter
between the ECU and the harness. Check the voltage
of the pin J1-42 (intake air manifold absolute pressure
sensor output), J1-27 (intake air temperature sensor
output), J1-43 (coolant temperature sensor output),
J1-62, J1-06, J1-38 (oxygen sensor output), J1-01
(ignition switch), J1-54, J1-33, J1-53, J1-34 (output to
idle speed actuator) of the ECU. Is it OK?
No Repair or replace harness
Yes Next step
6
Run the engine at an idle speed. Check if the intake
air pressure is between 35kPa and 65kPa.
No Check and repair
Yes Next step
7
Connect the fuel pressure gauge valve. Short-circuit
the pin J1-47 and the pin J1-73 of the fuel bump relay,
and run the fuel pump. Check if the fuel pressure is
about 300kPa.
No 11
Yes 10
8
Connect the battery and the fuel injector with a special
connector. With the voltage supply of 12V, check the
fuel injector for normal operation.
No Next step
Yes Next step
9
Wash the fuel injector and check the fuel injector
again for normal operation.
No Replace fuel injector
Yes Replace fuel
10 Chek if the fuel is wrong or contains water.
No 16
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