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Ignition System
Spark Plug Inspection
1. Inspect the electrodes and ceramic insulator.
Burned or w o r n electrodes m a y be caused b y :
• Advanced ignition t i m i n g
• Loose spark plug
• Plug heat range too hot
• Insufficient cooling
Fouled plug may be caused by:
• Retarded ignition t i m i n g
• Oil in combustion chamber
• Incorrect spark plug gap
• Plug heat range too cold
• Excessive idling/low speed running
• Clogged air cleaner element
• Deteriorated ignition coil or ignition wires
W o r n o r d e f o r m e d
e l e c t r o d e s
D a m a g e d
g a s k e t
> I m p r o p e r g a p
» O i l - f o u l i n g
• C a r b o n d e p o s i t s
» C r a c k e d c e n t e r
e l e c t r o d e i n s u l a t o r
C r a c k e d
i n s u l a t o r
2. Check the electrode gap.
'98-99 models:
• Adjust the gap w i t h a suitable gapping tool.
Electrode Gap
Standard (New): 1.0
1.1 m m (0.039
0.043 in.)
• Replace the plug if the center electrode is
rounded (A).
Spark Plugs
NGK:
Z F R 5 F H
DENSO:
KJ16CR-L11
1.1 m m ( 0 . 0 4 3 in.)
'00-02 models:
• Replace the spark plug if the gap is out of
specification.
Electrode Gap
Standard (New): 1.0-1.1 m m ( 0 . 0 3 9 - 0 . 0 4 3 in.)
Sercive Limit:
1.3 mm (0.05 in.)
• Replace the plug if the center electrode is
rounded (A).
Spark Plugs
NGK:
PZFR5F-11
DENSO:
PKJ16CR-L11
3. Apply a small quantity of anti-seize c o m p o u n d to
the plug threads, and screw the plugs into the
cylinder head finger-tight. Torque t h e m to 18 N-m
(1.8 kgf-m, 13 Ibf-ft).
4-26
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Table of Contents
Troubleshooting
