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lgnition System
1 .
I n s p e c t t h e e l e c t r o d e s a n d c e r a m i c i n s u l a t o r f o r :
Spark Plug lnspection
. lmproper gap
. Oil-fouling
. Carbon deposits
. Cracked center
electrode insulator
D a m a g e d
gaskei
Burned or worn electrodes may be caused by:
. A d v a n c e d i g n i t i o n t i m i n g
. Loose spark plug
. Plug heat range too low
. I n s u f f i c i e n t c o o l i n g
Fouled plugs may be caused bY:
. Retarded ignition liming
. O i l i n c o m b u s t i o n c h a m b e r
. Incorrect spark plug gap
. Plug heat range too high
. E x c e s s i v e r d l i n g ' l o w s p e e d r u n n i n g
. C l o g g e d a i r c l e a n e r e l e m e n t
. Deteriorated ignition coil or ignition wires
81881, 818C5 engine:
. Adjust the gap wjth a suitable gapping tool, and
replace the plug if the center electrode is rounded
as shown below.
Electrode Gap:
S t a n d a r d
' l
. 1 ; r m m { 0 . 0 4 3 ; o o a i n )
E.
23-98
3 . 818C1 engine:
a Do not adjust the gap ol a platinum tip plug;
replace the spark plug it the center electrode is
rounded or if the gap is not within the specifi-
cattons.
Electrode Gap:
S t a n d a r d I t . s - 3 . , m m ( 0 . 0 5 1 - 3 . o o 4 i n )
5 .
PLATINUM TIP
NOTE: Use onlv the spark plugs listed below
Spark plug
Bl88l engine:
N G K
I Z F R 5 F - 1 1
DENSO
I KJ 16CR-111
818C1 engine:
N G K
P F R 6 G - 1 3
DENSO
I PK2OPR-113
818C5 engine:
N G K
P F R 6 G - I 1
D E N S O
P K 2 O P R - 1 1 1
Apply a small quantity ot anti-seize compound to the
plug threads belore installing the plugs.
Screw the plugs into the cylinder head tinger tight,
t h e n t o r q u e t h e m t o 1 8 N . m ( 1 . 8 k g f . m , 1 3 l b f . f t ) .
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Table of Contents
Troubleshooting
