JAC J2 User Manual

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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
groundin
g
metal a
t
about 14
mm.
c.
Start the
engine for about
3s, check
whether there
are sparks
produced between
the edge
of spark
plug and the g
rounding meta
l.
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 hi
gh
voltage wire has trouble.
■
If
there are no
sparks,
replace spark plug.
3) Installation
Install with steps contrary to dismantlement.
II.
Diagnosis
of
Common
T
roubles
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
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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
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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.
95Ω
High voltage
Ignition coil
Secondary
coil
resistance
8.7±0.87 KΩ
Spark
plug
Spark
plug
clearance
0.7-0.8
mm

JAC J2 Specifications

General

Brand	JAC
Model	J2
Category	Automobile
Language	English