Chery automobile Service Manual page 195

15) Poor and weak performance during acceleration
Verify that there are any malfunctions such
as slipping of clutch, low pressure of tires,
1
delay in braking, and wrong size of tires or
inaccurate four-wheel alignment.
2 Verify that the throttle can be fully opened.
Turn the ignition switch to "ON" position.
Inspect with the diagnostic tester to see
3
whether there
information record.
Run the engine at idle speed until the
coolant temperature reaches its normal
4
range in order to verify that the ignition
advance angle is normal.
Turn the ignition switch to "ON" position
and connect the adaptor between ECU and
the wiring harness. Verify that the voltages
at following pins of ECU including absolute
pressure sensor of air intake manifold,
throttle valve position sensor, air intake
5
temperature sensor, coolant temperature
sensor, oxygen grounding terminal and
signal output
grounding terminal and pins of 32# and 33#
(used as sensor power supply of 4.5-5V) are
normal.
Verify that the air intake pressure is being
6
maintained between 35-65 kPa at idle speed.
Connect the fuel manometer valve. Short the
30# and 87# pins of the fuel pump relay to
7
operate the fuel pump in order to verify that
the fuel pressure is being maintained at
about 350kPa.
Apply a voltage supply of 12V directly
between the battery and the fuel injector
8
with special connector and verify that the
fuel injector functions normally.
After washing and cleaning the fuel injector,
9
verify again that it can function normally.
10 Verify that the fuel is deteriorated or
is any malfunction
terminal, sensor
G-86
Yes
No Proceed to next step.
Yes Proceed to next step.
Replace or repair the
No
Yes
No Proceed to next step.
Yes Proceed to next step.
No Inspect other items.
Yes Proceed to next step.
Repair or replace the
No
signal
Yes Proceed to next step.
No
Yes Proceed to next step.
No Proceed to Step 11.
Yes Proceed to Step 10.
No Proceed to next step.
Yes Proceed to next step.
No
Yes
Repair
throttle
Fix the indicated
malfunction
wiring harness.
Overhaul
Replace the fuel
injector.
Replace the fuel.