146 EMISSION CONTROLS AND FUEL SYSTEM
AIR SWITCHING
REAR INJECTOR
SOLENOID
FRONTINJECTOR
FUEL VAPOR SOLENOID
Typical CCC system component locations—left side view (1982 shown)
specific engine operating conditions, as
sensed by the various monitoring devices of
the computer emissions system.
The 1982-84 EST system is slightly differ-
ent than the 1981 system, in that it uses a
detonation sensor, mounted on the right side
of the cylinder block in front of the starter.
The purpose of the sensor is to "tell" the ECM
when the engine begins to "ping," allowing
the ECM to signal the distributor module to
retard the spark timing just enough to keep
the engine on the verge of detonation, with-
out causing engine damage. If severe deto-
nation occurs on engines equipped with the
OXYGEN SENSOR
•
Typical CCC system component locations—right side view (1982 shown)
HOOD LOUVRE
RELAY
OIL PRESSURE
SWITCH
MAP SENSOR
THROTTLE POSITION
SENSOR
AIR
CONTROL
SOLENOID
FRT
COOLANT TEMPERATURE
SWITCH
FRONT
INJECTOR
EGR CONTROL VALVE
RELAY SOLENOID
GROUND
WIRES
AIR SWITCHING
SOLENOID
