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Distributor
lgnition system with contact breaker assembly
B8
Vacuum advance/retard
Sonre dislributors are equipped with a vacuum conlrol
unir wlth 1wo vac!um hoses. In such cases the contro
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unil regulales both vacuum advance and retard.
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8 1 0
Checking vacuum advance
Connect a vacuurn pump to vacuum control unii- R!n
englne at id e speed and record ignilion advance ln
a r d c l e r k r 1 . l r q l i r o r d d v . r c P . _
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l i i g n i t i o n a d v a n c e d o e s n o t i n c r e a s e c h e c k v a c ! u m
B9
Delay valve
B e c a u s e o f e x h a u s t e m i s s i o n a w s s o m e v e h r c l e s a r e
e q u i p p e d w i t h a d e a y v a l v e c o n n e c t e d b e t w e e n t h e
i n l e t r n a n i f o l d a n d v a c u u m c o n t r o l u n n
S € v e r a l d i f f e r e n t t y p e s o f v a v e s a r e n u s e O n a l t y p e s
" D l S T m u s t f a c e d i s t r i b u t o r .
C h e c k t h a t i t l s p o s s i b l e t o s u c k a i r t h r o u g h t " D L S T " s i d e
o i v a l v e a n d t h a t i t i s v e r Y d i f f l c ! t 1 0 b l o w a r l h r o u g h
8 1 1
Checking vacuum retard
R u n e n g i n e a l i d e s p e e d .
C h e c k t h a t i g n i l i o n i s r e t a r d e d w h e n v a c u u m h o s e i s
l f n o t , c h e c k c o n d i t i o n o f h o s e . l f h o s e i s i n g o o d c o n d i
t i o n c h e c k v a c u L r m c o n t r o l u n r t .
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