Emission Systems - Transmission Controlled Spark 1971
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The 1971 TCS system was altered to meet the more stringent emission control requirements for 1971 by adding, deleting or changing electrical andmechanical control devices. The system was remaned "Combustion Emission Control" (CEC).
Changes made include:
See here for 1970 version and here for 1972 version.
The CEC solenoid is controlled by the temperature switch, transmission switch, and the time-delay switch.
CEC solenoid energized by the Hot Override Circuit.
Solenoid activated by time-delay relay.
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A completely new vacuum advance solenoid.
Two new relays: A 20-second time delay relay and a
reversing relay.
Elimination of the 1970 type relay.
Elimination of the idle stop relay.
Recalibration of the temperature override switch, up to
82° F from 63° F.
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