Evaporation Control System - Chevrolet 1971 Camaro Owner's Manual

EVAPORATION CONTROL SYSTEM
LIQUID/VAPOR
SEPARATOR
OPERATION: All General Motors passenger cars
and light trucks are equipped with an Evaporation
Control System. This system is designed to minimize
the escape of fuel vapors to the atmosphere. Included
in the system are a special fuel tank, liquid-vapor
separator, carbon canister, canister purge hoses, and
carburetor modifications. Fuel vapors which would
otherwise escape to the atmosphere are directed into
the carbon canister. The carbon adsorbs the vapors
and stores them. The vapor is removed from the
46
canister during periods of engine operation as mani-
fold vacuum draws the vapors into the engine and
burns them.
NOTE: Th. G.n.r.' Motora E".por.tlon Control Sy.t.m I. de-
.'gn.d to control ."aporatlon 10 •••• trom your c.r und.r normal
condition. u.'ng
9
lb. R.ld Vapor Pr ••• ur. tu.' .p.cltl.d
by
F.d.r.' .nd C.lltorn/a t •• t r.qulr.m.nt •. How.".r,
It
'Iou .hould
u.. tu.' ot .bnorm.lly high "o/.tlllty tor .x/.tlnll t.mperatur.
condition., you may d.t.ct • ga.olln. odor during or att.r dr/,,·
Ing In h •• "y tr.mc.
It
'Iou find thl. obJ.ctlonabl., you may pr.t.r
to u •• • low.r "o/atlllty tu.'.
MAINTENANCE: For proper system perform-
ance, periodic canister tllter servicing II re-
quired. Every 12 months or 12,000 miles, which-
ever comes first (more often under dusty con-
ditions) the filter In the base of the can liter
should be replaced and the canister Inspected.
NOTE: Should
It
.".r b. n.c •••• ry to r.pl.c. the tu.' tank cap,
u •• only the .peclfl.d c.p.
NOTE: For your convenience, all of the recom-
mended services for air pollution control systems
previously discussed are summarized by time and
mileage intervals in the Maintenance Schedule of
this manual.