Chery S11 / Chery QQ. Manual - part 236
Chery QQ Maintenance Manual 465 EFI System
4） RPM is normal but difficult in starting
No. Operation
steps Test
results
Next step
Yes Eliminate
malfunction
1
Turn on ignition key. Use tester to check if
malfunction information record exists.
No Next
Yes Next
2
Check if air filter is through.
No Replace
Yes Next
3
Check if MAP pressure is 35—65 kPa at idle
after start.
No Eliminate
intake
system leak
4
Step down throttle slightly and check engine can
start easily.
Yes
Replace or check
throttle valve
Yes Next
5
Connect fuel pressure gauge valve. Short pin 30
on fuel pump relay and pin 87 to start fuel pump.
Check if fuel pressure is 250—300 kPa.
No 9
Yes 8
6
Use special connector to supply 12 V voltage
from battery to injector and check if injector
works normally.
No Next
Yes Next
7
Re-check if injector can inject fuel after cleaning.
No
Replace injector
Yes Replace
fuel
8
Replace fuel. Check If fuel deteriorates or
contains water.
No 14
Yes Next
9
Check if fuel pressure below 250kPa.
No 13
Yes Next
10 Shut off fuel gauge valve. Connect ignition key
again to run fuel pump for 3 seconds. Check if
fuel pressure can be set up.
No 12
Yes Replace
fuel
pressure regulator
11 Open fuel gauge valve, use return fuel blocker to
clamp fuel pipe for no returning fuel. Check if
fuel pressure can be set up soon.
No
Repair and replace
injector or fuel pipe
Yes
Repair and replace
fuel pipe
12 Connect fuel pessure gauge valve. Short pin 30
on fuel pump relay and pin 87 to start fuel pump.
Check if fuel pressure is 250—300 kPa
No
Replace fuel pump
Yes
Repair or replace
returning fuel pipe
13
Check returning fuel pipe is blocked or bend.
No
Replace fuel
prassure regulator
Yes Next
14 Pull out idle actuator connector before coolant
temperature reaches 35 C
and check if engine
speed is dropping.
No
Repair or replace
idle actuator
15 Yes
Next
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