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r
ADJUSTMENT OF SET
PRESSURE
OF BOOST
CONTROLLED
DECELERATION
DEVICE
B C D D
Generally
it is unnecessary
to
ad
just
the B C
D
D
however if
it
should
become
necessary
to
adjust
it
the
procedure
is
as
follows
Prepare
the
foUowlnB
tools
I
Tachometer
to
measure
the
en
gine
speed
while
idling
and
a screw
driver
2
A
vacuum
gauge
connecting pipe
Note
A
qui
k response
type
boost
gauge
such
as
Bourdon
s
type
is
recommended
a
mercury
type
manometer
should
not be
used
To
properly
set
the
B
C D
D
set
pressure
proceed
as
follows
I
Remove
the
harness of solenoid
valve
TO
D D
solenrod
VT
FJ
1
B
C
D D
solenni
valve harness
J
ri
y
EF262
F g
ET 32
Removing
harneS5
of
solenoid valve
2
Connect
rubber
hose
between
vacuum
gauge
and intake manifold
as
shown
Fig
ET 33
Connecting
vacuum
gauge
3
Warm up the
engine
until
it is
heated
to
operating temperature
Then
adjust
the
engine
at normal
Engine
Tune up
idling
setting
Refer
to
the
item
Idling Adjustment
in
page
ET II
Idling engine speed
Manual
transmission
750 rpm
Automatic transmission
in
D
position
650
rpm
4
Run
the
engine
under
no
load
Increase
engine speed
to
3 000
to
3 500
rpm
then
quickly
close throttle
valve
5
At
the
time
the
manifold
vacuum
pressure increases
abruptly
to
600
mmHg
23
62
inHg
or
above
and
then
gradually
decreases
to
the level
set at
idling
6
Check that
the
BC D D
set
pres
sure
is
within
the
specified
pressure
Specified
pressure
0
m
sea
level
and
760
mmHg
30
inHg
atmos
pheric
pressure
Manual
transmission
510
to
550
mmHg
20
1 to
21
7
inHg
Automatic
transmission
490
to
530
mmHg
19
3 to
20 9
inHg
Note
When
checking
the
set
pressure
of
B CD D
find the
specified
set
pressure in
Figure
IT
36 from the
atmospheric
pressure
and altitutde
of the
given
location
For
example
if
a
manual transmis
sion model vehicle
is
located
at
an
altitude of 1 000
m
3 280 ft
the
specified
set
preSsure
for
B
C D
D
445
mmHg
17 5
inHg
7
If
it is
higher
than the
set
level
turn
the
adjusting
screw
counter
clockwise
or
nut
clockwise
until
correct
adjustment
is
made
Non California models
Adjusting
screw
type
California models
Adjusting
nut
type
Note
When
adjusting
BC
D D
for
California models
turn
adjusting
nut
in
or
out
with lock
spring
in
place Always
set
lock
spring
prop
erly
to
prevent
changes
in
set
pres
sure
ET
18
Non
cal i f o rni a
models
1
Adjusting
screw
2
Cover
e
ET037
California models
r
1
Adjusting
nut
2
Lock
spring
EC692
Fig
ET 34
Adjusting
Bet pressure
8
Race the
engine
and check for
adjustment
9
If
it is
lower than the
set
level
turn
the
adjusting
screw
or
nut
until
correct
adjustment
is made
10
Race
the
engine
and check
for
adjustment
If
engine speed
cannot
be decreased
to
idling
when
checking
B C D D
set
pressure
proceed
as
follows
When the
engine
speed
does not
fall
to
idling speed
it
is
necessary
to
reduce the
negative idling
pressure
of
the manifold
to
lower than the
set
pressure
of the
B
C
D
D
The
engine
speed
will
not
drop
to
idling speed
when the
negative idling
pressure is
higher
than the
set
pressure of the
B
C D D
In
this
case
the
engine
must
be
labored
by I
road
test
or
2 chassis
dynamometer
or
3
by raising
up
rear
suspension
member
on a
stand accel
erating
the vehicle
to
64
to 80
krn
h
40
to
50 MPH
in
top
gear
manual
transmission
or
in
D
position
auto
matic transmission
and then
releasing
the accelerator
pedal
and
letting
the
vehicle decelerate
After
doing
this
check whether
the B
C D D
set
pres
sure
is
at
the
predetermined
value
or
not
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