Subaru 1600 Service Manual page 140

7.
Check and Adjustment
1) Automatic Choke Mechanism
Adjustment
1) When the choke is closed, the pri·
mary throttle valve is slightly opened
from its
~ully
closed position by the
action of the fast idle cam and the
linkage. At this time, the top of the
cam adjusting lever rests on the first
(highest) step of the fast idle cam. This
angle is called fast idle opening angle,
Which is suitable for starting the en-
gine in cold weather. In this condition,
measure the clearance
G,
indicated in
the figure which should be as specified
in the table.
If the clearance G, is not to specifi·
~
_
~ti()n,
adjust by means of the fast idle
_
~
• • ting
",ow
. Check of thermo vacuum valve (II)
~ ..
.. Connect vinyl tubes to output ports
. of thermo vacuum valve (II).
, After soaking valve in cooled water
i
[approx. below 10°C (SO°F)] for some
time, heat the water.
Below air into the valve as shown in
the illustration, and confirm that the
valve opens or closes in response to the
speCified temperature.
NOTE:
00
not allow water to get into die
dlermo vacuum valve (II).
Vinyl tube
v.J'..--+--
Thermo vacuum
valva
(II)
Fig.
441
A 10-116
Thermo vacuum valve (II)
Fully open Fully closed
below 14°C
above 20°C
(57°F) (68°F)
FUEL SYSTEM
Fig. 4·40 Fast idle mechanism
1 Fast idle adjusting screw
2
Cam adjusting lever
3
Fast idle
cam
4 Cam
connecting rod
5 Throttle valve
6
Bend this pawl to adjust choke
valve opening angle
7
Choke lever
8
Choke valve
AS-170
~
DCP306·I7
DCP306·I8 DCP306·I9
DCP306·2I DCP306·22
Clearance
G,
0.98 mm 1.22 mm 1.34mm
(0.0386 in)
(0.0480 in) (O.OS28 in)
Fast idle opening angle
Spring
Valve
... To air
cleaner
l..IIiI"-==-To
ISO
carburetor
Fig.
442
AS-384
2) Check of Solenoid Valve
(III)
Check the resistance between
(+) and (-) terminals.
Standard resistance:
32.7 - 39.90
YES
Check the resistance between
(+) or (-) terminal and body.
Standard resistance:
1 MO or more.
YES
Check the vacuum passage for
opening and closing operation
while applying electric current
on both (+) and (-) terminals.
1
YES
~
17.s° 18.5°
NO
NO
, Replace
NO
NOTE:
Usually (when die current is OFF), die
plunger is forced upwards by die
spring force to close the passage
between
®
and
@.
When the current
is ON in die solenoid, die plunger is
attracted downwards to open die
passage between
®
and
@.