Ford COUGAR 1968 Shop Manual page 464

GROUP 10
-
Fuel System
5. Raise the water temperature
to 100 degrees F, allow 5 minutes to
stabilize temperature, and observe the
valve plate position. The correct po-
sition should he in the heat on posi-
tion (Fig.
jj.
6. lncreaee the water temperature
to 135 degrees F, allow five minutes
to stabilize the temperature, and ob-
serve the v-lve plate. The valve plate
should be In the heat off position
(Fig.
4).
If the valve plate does not meet
the requirements as outlined in steps
5 and 6, and no plate and duct inter-
ference
i$
observed, the duct and valve
assembly should be replaced.
Duct a n d Valve Assembly w i t h
V a c u u m Motor Attached Directly
t o Air Cleaner-390 GT Only
In additi,on to checking the duct
and valve assembly, the vacuum motor
that is attached to the air cleaner
should be checked for functional op-
eration.
1.
Start the engine, observe the
vacuum motor plate. It should be fully
closed (F.ig.,S).
2. Disconnect the vacuum hose at
the vacuum motor. The plate should
be in the full-open position.
3. If the positiol~s a s , described,
.
are not ~ b t a i n e d , check for interfer-
'
ence and alignment of plate and motor
rod and vacuum from the hose at the
vacuum motor (minimum of 15 inches
hg.).
I f vacuum is no' availah~e, check
the hose and connection for ledks.
4. I f thq vacuurn motor mire still
remains in one position, remove the
vacuum motor from .the alr cleaner,
connect it to another vacuum source
to confirm that vacuum motor is not
operating. If the motor rod does not
move when vacuum is a ~ p l i e d , the
motor is defective and should be
replaced.
5. Reassemble the motor to the
air cleaner and repeat steps I and 2.
Duct a n d Valve Assembly V a c u u m
Override System,
.
1. With the duct assembly instal-
led on the vehicle, cold engine, and
ambient temperature in the engine com-
partment less than 100 degrees F, the
valve plate should be in approximately
"
112 heat on position (Fig. 6).
2. If the plate is not in the
above position, check for possible in-
VACUUMMOTOR PLATE MOTOR R O D VACUUM MO
t i r
INTAKE MANIFOLD
VACUUM
CLOSED
POSITION
FIG. 5-390 G T Air Valve a n d Varuum Motor Assembly
AIR
FIG.
6-Duct a n d Valve Assembly in Partial Heat-On Position-Cold
Acceleration
terference of plate,
uum motor which
plate to bind in its
rect, i f interference
alienine the d a t e
duct, and/or vac-
would cause the
given travel. Cor-
is present, by re-
. -
-
or vacuum motor
as required.
3. Start the engine and observe
the valve plate position while the
engine is still cold. The correct posi-
tion for the plate is in the full heat
on
position. .Align the plate or vac-
uum motor i f interference is noted.
4. If the valve plate remains only
in the 112 heat 04 or. up position, as
observed in step, I, remove the vac-
mum of 112-inch, the motor is func-
tional and should be reassembled into
the duct assembly and a check made
for interference and misalignment and
a check of the thermostat bulb should
be made as outlined under Duct and
Valve Assembly.
9.' I f ttie motor rod does .not 'move
a minimum of 112-inch, the motor is
defective and should be replaced.
After assembling the replacement mo-
tor into the,duct assembly, a check
should be made as outlined in steps
'
I thru 5 to be sure alignment is cor-
rect and no interference exists.
uum hose at the- override vacuum mo-
tor and check for vacuum at the hose
CARBURETOR TESTS
(rninimum of 15 inches hg at idle).
5. If the vacuum is less than 15
inches hg, check for vacuum leaks in
the hose and hose connection.
6. When the vacuum meets speci-
fication, reconnect the hose to the
override motor and again with under-
hood temperature less than 100 de-
grees F, observe the valve plate po-
sition.
7. I f .the plate still remains only
in the 112 heat on position and there
is no interference between the valve
plate, duct, or vacuum motor rod, the
vacuum motor should then be removed
and connected to another vacuum
source.
8. If the motor rod moves a mini-
Accelerating P u m p Discharge
Test
1. Remove the air cleaner (Part
10-7).
2. Open the primary throttle
plates and observe the fuel flow from
the accelerating pump discharge noz-
zles. If the system is operating correct-
ly, a quick steady stream of fuel will
flow from the discharge nozzles.
Power Valve Tesh
1
A power valve test can be perform-