Inspection Of Ignition Timing - Chery automobile Service Manual

OVERHAUL IGNITION SYSTEM
----Disconnect the negative grid of the battery.
----Remove the spark plugs with a special tool, and check whether the spark plugs have been
ablated and there is any crack at the skirt section.
----Check whether the gap of spark plugs complies with the requirement.
Standard value: 1.1±0.5mm
----Check the spark plugs.
Note:
Do not check, adjust or clean the gap of spark plugs with a metal brush. Otherwise, it
will damage the platinum igniter.
When spark plugs are cleaned with compressed gas, the cleaning process should be
completed within 20 seconds and the compressed gas value should not exceed 58.8kpa
2
(6.6kgf/cm , 8.5psi). After completion of cleaning, make sure that no foreign materials
such as carbon or sand are left in spark plugs.
----Check whether there is any crack on the appearance of high voltage cables, and replace
the high voltage cable if the resistance is too high.
----Check whether the resistance of ignition coils complies with the specification.
Standard value: Primary coil resistance: 0.4Ω ±10% at the temperature of 23±5°C
Secondary coil resistance: 4900Ω±10% at the temperature of 23±5°C
If the resistance of ignition coils does not comply with the specification, please replace with
the original spare parts designated by Chery Automobile so as to prevent the improper
operation of the ignition system.

Inspection of ignition timing:

Note:
·The ignition timing must not be adjusted.
·Checking the ignition timing requires the usage of WDS or corresponding instrument.
1. Switch off all the electrical devices in the vehicle.
2. The procedures of preheating the engine are as follows:
(1) Start the engine
(2) Keep the rotation speed of the engine at about 3,000 R.P.M. until the cooling fan starts to
rotate.
(3) Release the fuel-accelerating pedal.
T-20