Chery A11 2003 Repair Manual page 772

Maintenance Manual for Chery · Windcloud
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.
16 Check if leakage or clogging occurs in fuel inlet
pipe.
17 Check if fuel return pipe is blocked up or bent.
18 Check if sensing hole of intake manifold pressure
and intake air temperature sensor is blocked up.
19 Make engine run at idle speed, when coolant
temperature reaches the point where closed-loop
control is activated, check to see if oxygen sensor
is in working order. (Fluctuating between 0-1V).
Check if leakage occurs in engine intake system.
20
21 Check if cylinder pressure of engine is normal.
22 Make engine runat idle speed, and check to see if
ignition advance angle is normal after coolant
temperature reaches normal value.
M7.9.7 EFI System
No Repair/
injector or fuel pipe
Yes Repair or replace
fuel return pipe
No Replace fuel pump
Yes Repair or replace
fuel return pipe
No Replace
pressure regulator
Yes Clean up
No Go to next step
Yes Go to next step
No Check
sensor and
harness
Yes Eliminate leakage
No Go to next step
Yes Go to next step
No Troubleshooting
Yes Replace ECU
No Check others
replace
fuel
oxygen
wire
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