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1
-
Vacuum
tank
2
-
Vacuum amplifier
3
-
Temperature
valve for
EGR
4
-
Exhaust gas
recirculation
(EGR)
valve
5
-
Two-way
valve
for
air
injection
-
California only
6
-
Temperature
switch
7
-
Divert er valve
-
California
only
8
-
Throttle
valve
housing
9
-
Intake manifold
10
- Decel
eration valve
-
Manual Transmission only
11
-
Ignition
distributor
Note
Engine cold
Temperature switch
is
closed, two -way valve
is
energized.
Vacuum connections 1
(blue
ring)
and
3 are
con-
nected
allowing
vacuum
from
vacuum tank to
operate
diverter
valve at all
times.
When vacuum is
applied
to
diverter
valve. diver-
ter valve
directs air flow
to exhaust manifold
.
Engine
at
operating
.
temperature
Temperature switch
is
open,
no current
at
two-
way
valve.
Vacuum connections
1
(blue
ring)
and 2
(red ring)
are connected allowing vacuum
from
throttle
hou-
sing to operate diverter
valve
depending on
thrott-
le
position
.
At low throttle
opening vacuum
applied to diverter
valve
directs
air flow to exhaust
manifold.
When throttle is
open,
there
is
no
vacuum to
ope-
rate
diverter
valve
so airflow is directed into air
cleaner housing
.
Exhaust System
Printed in Germany
-
II. 19
77
Checking
emission control
system
26
26
-
15
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