Maintenance Manual for J2 Sedan
Electrical Part of Engine
137
Inspect clearance of spark plug by using feeler.
Standard value: 0.7-0.8 mm
If the clearance is beyond the standard value, replace.
■
Check sparking ability of spark plug.
a. Connect spark plug to high voltage circuit.
b. Keep the distance between edge of spark plug and the grounding metal at about 14 mm.
c. Start the engine for about 3s, check whether there are sparks produced between the edge of spark
plug and the grounding metal.
Attention:
■
During check, be careful not to get an electric shock.
■
If the clearance is less than 14 mm, the sparks may also be produced even though the high
voltage wire has trouble.
■
If there are no sparks, replace spark plug.
3) Installation
Install with steps contrary to dismantlement.
II. Diagnosis of Common Troubles
Diagnosis Common Troubles
Symptom
Possible causes
Solution
Trouble of ignition coil or ignition
switch
Check or replace the ignition coil or the
ignition switch
Trouble of spark plug
Check or replace spark plug
The engine can’t or is
difficult to start.
Disconnected high voltage wire
Check the high voltage wire
Trouble of high voltage wire or spark
plug
Check the high voltage wire or check or
Replace spark plug
Unstable idle speed
Trouble of ignition coil
Check or replace the ignition coil
Trouble of high voltage wire.
Check the high voltage wire
Engine surge or poor
acceleration
Trouble of spark plug
Check or replace spark plug
Poor. fuel economy
Trouble of spark plug
Check or replace spark plug
III. Parameters for Maintenance
Maintenance Specification of Ignition System
Primary coil resistance
0.77-0.95
Ω
High voltage
Ignition coil
Secondary coil resistance
8.7±0.87 K
Ω
Spark plug
Spark plug clearance
0.7-0.8mm
