Hyundai Sonata 1991 Shop Manual page 26

MAINTENANCE SERVICE
EVAPORATIVE EMISSION CONTROL SYSTEM
Y10EMQA.
1. If the fuel-vapor vent line is clogged or damaged, a fuel-vapor
mixture excapes into the atmosphere causing excessive
emissions. Disconnect the line at both ends, and blow it
clean with compressed air. Remove the filler cap from the
filler pipe and check to see that the filler cap is seating
properly on the fuel filler pipe.
2. The overfill limiter (2-way valve) installed on the vapor line
between the canister inlet and fuel tank outlet should be
checked for correct operation.
Air filter
Fuel pump
Filter
...Jr~--
Fuel
Filter Fuel pump
Fuel filler cap
(Vacuum relief)
Overfill limiter
(Leveling pipe)
Fuel
check valve
Thermal expansion
volume
--
-
._.
,
.
. .
t
Purge-control
solenoid
I
valve :
\
Engine Canister
Charcoal-i+--l_
Fuel injector
... - - Purge air
_ _ Fuel vapo(
CANISTER (Replace)
Yl0ENQA
If or when the canister filter becomes clogged, the purge air
volume will decrease and consequently, the canister capacity will
be replaced.
10-14