Engine Electrical System

13) Malfunction to increase the speed or stall during acceleration
Yes
Fix the indicated
malfunction.
1
Turn the ignition switch to “ON” position.
Inspect with the diagnostic tester to see
whether there is any malfunction
information record.
No Proceed to next step.
Yes Proceed to next step.
2
Verify that the air filter is free of any
blockage.
No Replace
Yes Proceed to next step.
3
Run the engine at idle speed in order to
verify that the idle speed is normal.
No
Overhaul according to
the idle speed
malfunction instruction
Yes Proceed to next step.
4
Verify that the air intake pressure is
maintained between 35-65 kPa at idle
speed.
No Overhaul
Yes Proceed to next step.
5
Run the engine at idle speed until the
coolant temperature reaches its normal
value in order to verify that the ignition
advance angle is normal.
No
Adjust the ignition
advance angle
Yes Proceed to next step.
6
Connect the fuel manometer valve.
Short the 30# and 87# pins of the fuel
pump relay to operate the fuel pump in
order to verify that the fuel pressure is
being maintained at about 350kPa.
No Proceed to Step 10
Yes Proceed to Step 9
7
Apply a voltage supply of 12V directly
between the battery and the fuel injector
with special connector, and verify that the
fuel injector functions normally.
No Proceed to next step.
Yes Proceed to next step.
8
After washing and cleaning the fuel
injector, verify again that it can function
normally.
No
Replace the fuel
injector.
Yes Replace the fuel.
9
Verify that the fuel is deteriorated or
contaminated with water.
No Proceed to Step 15.
Yes Proceed to next step.
10
Verify that the fuel pressure is lower than
250kPa.
No Proceed to Step 14.
Yes Proceed to next step.
11
Turn off the fuel manometer valve.
Connect the ignition switch again to
re-operate the fuel pump in order to verify
that the fuel pressure can be established.
No Proceed to Step 13.
Yes
Replace the fuel
pressure regulator.
12
Turn on the fuel manometer valve and
clamp the fuel return pipe with the fuel
tube clamp to stop the fuel return in order
to verify that the fuel pressure can be
established quickly.
No
Repair or replace the
fuel injector or the fuel
pipe.
E-82
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