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As
a
result
an
excess
amount
of He
is emit led into the
atmosphere
In
order
to
avuid
such
He
emis
sions
the
B CD D is
adopted
The B
C
D D
consists
of
a
vacuum
ontrol
valve
@
and
a
mixture
control
valve
During coasting
in which
intake
vac
uull1
rises
above
a
certain
level the
vacuum
control
valve
@
is
opened
I
Air
jet
12
2
Diaphragm
II
13
3
Mixture
control
alve
14
4
Couting
air
bleed
II
IS
S
Mixture
air
passage
6
Secondary
barrel
7
Intake
manifold
16
8
Boost
passage
17
9
Vacuum
control solenoid
valve
to
Vacuum
control valve
II
Diaphragm
I
Emission Control
System
Then
negative
pressure is
drawn
into
the
vacuum
chamber
of the mix
ture
control
valve@
The mixture control
valve
supplies
mixture gas inlo the
intake
manifold
Complete
combustion of fuel
is
assisted
by
this additional
mixture
and
He
emi 5 Si o l l s
are
thereby
reduced
AB c D D
ut
Solenoid
serves to
inaclivate
B
c D
D
at
idling
1
L
A
speed
switch
monitors
the
car
speed
of
below 10
kmfh
6MPH
for
manual transmissiun models
It
actu
ates
the
cut
solenoid
to
inactivate the
B C D
D
On
automatic transmission
models
an
inhibitor
switch
monitors the
N
or
P
position
and
inactivate the
B
CD
D
p
@
I
I
L
j
I
I
@
I
I
J
J
Note
Broken line
applie5
only
to
Automatic Transmiuion
INSPECTION
AND
ADJUSTMENT
Generally
it
is
unncl
cssary
to
in
spect and
adjust
B C D D
however
if
it
should
become necessary 10
do
so
proceed
as
follows
Prepare
the
following
tools
I
Tat
hol1lcter
to
measure
the
en
gine speed
and
a
screwdriver
2
A
vacuum
gauge and
rubber hose
Note
A
quick
response
type
boost
gauge
such
as
Bourdon
s
type
is
recommended
a
mer c u r y type
manometer
should
not
be used
Inspect
B C D
D
operating
pressure
as
follows
I
Disconnect lead
wire
of B C
D
D
cut
solenoid
EC607
Fig
EC 20
Disconnecting
B C D D
olenoid
Note
Be
sure
to reconnect
ham of
solenoid after
inspection
or
adjust
ment
is
completed
2
Connect
rubber
hosc
between
vacuum
gauge
and
intake manifold
Idle
compensator
connector on
E G
R
passage
may
he used
for this test
EC
8
fl
EF231
Fig
EC 19 B C D D corutruction
Fig
EC 21
Conn
cting
vacuum
gau
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