Geely EC718 2009 Workshop Manual page 121

Engine
Symptoms
degree the engine idle speed
may fluctuate. Any of above
circumstance is likely serious
enough to make the engine
stall.
Engine stalls only when Air-
Conditioning is working.
Fault Definition: when Air-
Conditioning is working,
Suspected Fault Items
6. Idle Air Control Valve
7. Crankcase Ventilation Valve
8. Evaporative Emission (EVAP)
Canister Solenoid Valve
9. Knock Sensor (KS) System Ignition
Delay
10. Spark Plug: Incorrect thermal value,
damp, crack, incorrect gap, excessive
erosion, excessive carbon residue and
contaminated by fuel
11. Spark Plug Wire Damage
12. Ignition Coil Damage
13. Crankshaft Position Sensor
14. Excessive Engine Oil in Combustion
Chamber or Valve Seals Leakage
15. Incorrect cylinder compression
pressure
16. Valve Stagnant or Leaking, Valve
Spring Broken, Incorrect Valve Timing
17. Excessive Carbon Residue in
Combustion Chamber
18. Electromagnetic interference (EMI)
in voltage circuit may lead to engine
Misfire. Use the scan tool to monitor the
engine speed to detect electromagnetic
interference. Engine speed parameter
sudden increase while the actual engine
speed is almost no change indicates
presence of electromagnetic
interference. If there is fault, check
whether there is a high voltage part in the
vicinity of the ignition control circuit.
19. Check engine mountings.
1. Air-Conditioning signal circuit
2. Idle Air Control Valve Stagnant
Control System JL4G18-D
Relevant Sections
This section2.2.8.1 Idle Air Control Valve
Replacement.
"Auxiliary Emissions Control Device" in
the2.4.6 Diagnostic Information and
"Auxiliary Emissions Control Device" in
the2.4.6 Diagnostic Information and
Ignition System "in the2.10.7 Diagnostic Information
and Procedures
This section2.2.7.29 DTC P0321
"Mechanical System" in the2.6.7 Diagnostic
Information and Procedures.
"Engine Mechanical System" in
Mount Replacement.
"Air-Conditioning System" in
Information and Procedures.
This section2.2.8.1 Idle Air Control Valve
Replacement.
EC718/EC718RV EC715/EC715RV 10/2009
2-39
Procedures.
Procedures.
P0322.
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the2.6.8.7 Engine
the8.2.7 Diagnostic