Maintenance Manual for Chery·Windcloud Marelli EFI System
with fuel return interceptor to ensure no fuel
return, and check if fuel pressure is formed
rapidly.
No Repair/ replace
injector or fuel pipe
Yes Repair or replace
fuel return pipe
16 Check if leakage or clogging occurs in fuel inlet
pipe.
No Replace fuel pump
Yes Repair or replace
fuel return pipe
17 Check if fuel return pipe is blocked up or bent.
No Replace fuel
pressure regulator
Yes Clean up 18 Check if sensing hole of intake manifold pressure
and intake air temperature sensor is blocked up.
No Go to next step
Yes Go to next step 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
100-900mV).
No Check oxygen
sensor and wire
harness
Yes Eliminate leakage
20
Check if leakage occurs in engine intake system.
No Go to next step
Yes Go to next step 21 Check if cylinder pressure of engine is normal.
No Troubleshooting
Yes Replace ECU 22 Make engine runat idle speed, and check to see if
ignition advance angle is normal after coolant
temperature reaches normal value.
No Check others
45
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