Geely EC718 2009 Workshop Manual page 689

Engine
Symptoms
Fault Definition: When Air-Conditioning
is working, the engine speed is instable
or engine stalls.
High Fuel Consumption, Poor Fuel
Economy
Fault Definition: During the actual road
test, fuel consumption is significantly
higher than expected. In addition, the
fuel consumption is also significantly
higher than the actual road test the
same vehicle had.
Suspected Faulty Items
2. Electronic Throttle Body
3.ECM
1. ECM Power Supply Circuit
2. Mixture Too Rich
3. Air filter Blocked
4. Poor Fuel Quality, Fuel Contamination
5. Fuel Pressure Abnormal
6. Injector Working Abnormal
7. Electronic Throttle Body
8. The driver has the following driving habits:
• Air-Conditioning or Defroster Always On
• Tire pressure is incorrect
•
Vehicle Overload
• Accelerate Too Fast, Too Frequent
9. Air Leakage In Intake System and Crankcase
System
10. Crankcase Ventilation Valve Catching
11. Knock Sensor (KS) System Ignition Delay
Too Great
12. Spark Plug: Thermal value is incorrect,
damp, crack, gap incorrect, excessive erosion,
excessive carbon residue, contaminated by fuel
13. Spark Plug Wire Damage
14. Ignition Coil Damage
15. Coolant Level Too Low, Thermostat
Malfunction
16. Too Much Oil In Combustion Chamber or
Valve Seals Leakage
17. Cylinder Compression Pressure Incorrect
18. Valve Stagnant or Leaking, Broken Valve
Spring, Valve Timing Incorrect
19. Too Much Carbon Residue In Combustion
Chamber
Control System JL4G15-D
Relevant Sections
Refer to 2.12.7.54 DTC P2135
Refer to 2.2.8.8 Engine Control Module
Replacement
Refer to 2.12.7.43 DTC P0562 P0563
Refer to 2.12.7.26 DTC P0171 P0172
P1167 P1171 P2187 P2188
Refer to2.13 Fuel System JL4G15-
Din2.13.1 Diagnostic Information and
Procedures
Refer to 2.12.7.54 DTC P2135
Refer to2.14 Auxiliary Emission Control
JL4G15-Din2.14.2
Information and Procedures
Refer to2.20 Ignition System JL4G15-
Din2.20.4 Diagnostic Information and
Procedures
Refer to2.18 Engine Cooling System
JL4G15-Din2.18.3
Information and Procedures
Refer to2.6 Engine Mechanical System
JL4G18-Din2.6.7
Information and Procedures
EC718/EC718RV EC715/EC715RV 10/2009
2-607
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Diagnostic
Diagnostic
Diagnostic