Geely EC718 2009 Workshop Manual page 612

2-530 Ignition System JL4G18-D
2.10.7.6 Spark Plug Diagnostic
Step 1 Remove the spark plug. Refer to
Next
Step 2 Check whether the terminal terminal A is bent or broken, pull the terminal to test whether the terminal A is
loose.
Next
Check whether the B-insulator has arcing or signs of leakage, which is due to discharge between terminal
Step 3
A and terminal B two ends.
Next
Step 4 Check whether there is crack on the insulator B, otherwise it will cause discharge.
EC718/EC718RV EC715/EC715RV 10/2009
A
2.10.8.4 Spark Plug
B
D
C
Replacement.
Check whether there are following conditions:
(a) Check the high-voltage damping line for damage.
(b) Check whether the cylinder head spark plug groove is wet.
Whether there is engine oil, engine coolant or water. Damped
spark plug will cause arc discharge.
Engine
FE02-2050b