Chery A11 2003 Repair Manual page 305

Maintenance Manual for Chery·Windcloud
13). Slow response when accelerating
1 Set ignition switch in "ON". Check with scanner
to see if there is failure information record.
2 Shut down the engine and check if air filter is
smooth.
3 Make engine run at idle speed, and check to see
if rotating speed is normal when idling.
4 Make engine run at idle speed, and check to see
if intake pressure is between 35-65kPa
5 Switch
commutator between ECU and wire harness to
check the voltages of output signal terminal,
ground terminal and 76#, 60# pins (served as
4.5-5V sensor power) of ECU throttle position
sensor to see if they are in good order.
6 Make engine run at idle speed, and check to see
if ignition advance angle is normal after coolant
temperature reaches normal value.
7 Connect fuel pressure gauge valve. Strap the
30# and 87# pins of fuel pump relay to make
fuel pump work, and then check if fuel pressure
is at about 350kPa.
8 Provide 12V voltage directly from accumulator
to injector with special connector, and check if
injector is working in good order.
9 Recheck injector to see if it is working in good
order after cleaning.
10 Check if fuel is deteriorated or contains water.
11 Check if fuel pressure is lower than 350kPa
12 Shut down fuel gauge valve. Switch on ignition
switch again to make fuel pump work once
more, and check if fuel pressure is established.
13 Turn on fuel guage valve, clamp fuel return pipe
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.
14 Check if leakage or clogging occurs in fuel inlet
pipe
15 Check if fuel return pipe is blocked up or bent.
16 Check exhaust system and three-way catalytic
converter to see if they are blocked up.
on ignition switch
Yes
No
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Yes
No
and connect Yes
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Yes
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Yes
No
Yes
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Yes
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Yes
No
Yes
No
Yes
No
Yes
No
Yes
No
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No
Yes
No
Marelli EFI System
Eliminate failure
displayed
Go to next step
Go to next step
Replace
Go to next step
Refer to entry of idle
speed failure for
repair
Go to next step
Overhaul
Go to next step
Repair or replace
wire harness
Go to next step
Check others
Go to next step
Go to step 11
Go to step 10
Go to next step
Go to next step
Replace injector
Replace fuel
Go to step 16
Go to next step
Go to step 15
Go to next step
Go to step 14
Replace pressure
regulator
Repair/ replace
injector or fuel pipe
Repair or replace fuel
inlet pipe
Replace fuel pump
Repair or replace fuel
return pipe
Replace pressure
regulator
Replace or clean
Replace ECU
54