Oldsmobile 1970 Ninety-Eight Owner's Manual page 38

NEW CARBURETOR
LEAN MIXTURES,
ENGINE IDLE
INCREASED
KEY TO e.C.S. SYSTEM
~ ~Uf[D
UIlMtHOOD All
q
UNDERHOO D .. .
@.
1t(J1 UHAUSl
/fEAT EXCHANGED
FROM EXHAUST
MANIFOLD TO
UNDERHOOD
AIR FLOW
AIR
Controlled Combustion System (CCS)
The Controlled Combustion System is designed to reduce
exhaust air pollution by altering the combustion process.
CCS includes a special air cleaner which incorporates ther-
mostatic control of heated air to the carburetor, a special
calibrated carburetor and distributor and related components.
Complete effectiveness of the system, as well as full power
and performance, depend upon proper engine maintenance.
See service recommendations.
B-3
HOSE·SOLENOID
TO CARBURETOR
ClUN AIR
HOSE·SOlENOIO
~~~~~TO
OISTRIBIITOR
SOUNOIO
Transmission Controlled Spark (TCS)
Transmission Controlled Spark is another separate system
designed to further reduce exhaust emissions by permitting
vacuum spark advance during high gear operation only. TCS
includes a solenoid which controls vacuum advance to the
distributor
in
response to a signal from a switch operated
by the transmission. The system is designed to provide the
advantages of advanced spark timing when it is most needed.
TCS requires no regular service.