Geely EC718 2009 Workshop Manual page 691

Engine
Symptoms
Poor idle, Idle Speed
Inaccurate or Engine Stall
Fault Definition: When idling, the engine
running is not smooth. In extreme
cases, the engine or the vehicle will
tremble. With a certain throttle opening,
the engine idle speed may fluctuate.
Any of these circumstances is likely to
be serious enough to make the engine
stall.
Poor Idle, Idle Speed
Inaccurate or Stall
Fault Definition: When idling, the engine
running is not smooth. In extreme
cases, the engine or the vehicle will
tremble. With a certain throttle opening,
the engine idle speed may fluctuate.
Any of these circumstances is likely to
be serious enough to make the engine
stall.
Suspected Faulty Items
16. Camshaft Convex Corner Wear
17. Valve Timing Incorrect
18. Valve Spring Broken
19. Too Much Carbon Residue In Combustion
Chamber
20. Camshaft,
Connecting Rod and Bearing Abnormal
21. Exhaust Blocked: Three-Way Catalytic
Converter Blocked, Muffler Internal Damage
1. ECM Power Supply Circuit
2. Air Cleaner Filter Blocked
Unstable,
3. Fuel Pressure Abnormal
4. Fuel Contamination
5. Injector Working Abnormal
6. Electronic Throttle Body
7. Acceleration Pedal Position Sensor
8. Crankcase Ventilation Valve
9. Evaporative emission (EVAP) Canister
Solenoid Valve
10. Knock Sensor (KS) system ignition delay is
too great
11. Spark Plug: Thermal value is incorrect,
damp, crack, gap incorrect, excessive erosion,
excessive carbon residue, contaminated by fuel.
Unstable,
12. Spark Plug Wire Damage
13. Ignition Coil Damage
14. Crankshaft Position Sensor
15. Too Much Oil In Combustion Chamber or
Valve Seals Leakage
16. Cylinder Compression Pressure Incorrect
17. Valve Catching or Leak, Broken Valve
Spring, Valve Timing Incorrect
18. Too Much Carbon Residue In Combustion
Chamber
19. Check Engine Bearings
Control System JL4G15-D
Cylinder Head, Piston,
EC718/EC718RV EC715/EC715RV 10/2009
Relevant Sections
Refer to2.7 Exhaust System JL4G18-
Din2.7.5 Diagnostic Information and
Procedures
Refer to 2.12.7.43 DTC P0562 P0563
-
Refer to2.13 Fuel System JL4G15-
Din2.13.1 Diagnostic Information and
Procedures
Refer to 2.12.7.54 DTC P2135
Refer to 2.12.7.55 DTC P2138
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 to 2.12.7.35 DTC P0335 P0336
Refer to2.6 Engine Mechanical System
JL4G18-Din2.6.7
Information and Procedures
2-609
Diagnostic
Diagnostic