Vacuum Lines Description; Vapor Canister Description; Operation - Dodge Dakota Sport 2001 Service Manual

AN
PCV VALVE (Continued)
Fig. 23 PCV Valve/Oil Filler Tube Location
1 - O-RING
2 - LOCATING TABS
3 - CAM LOCK
4 - OIL FILLER TUBE
5 - PCV LINE/HOSE
6 - PCV VALVE
INSTALLATION - 4.7L
The PCV valve is located on the oil filler tube (Fig.
23). Two locating tabs are located on the side of the
valve (Fig. 23). These 2 tabs fit into a cam lock in the
oil filler tube. An o-ring seals the valve to the filler
tube.
(1) Return PCV valve back to oil filler tube by
placing valve locating tabs (Fig. 23) into cam lock.
Press PCV valve in and rotate valve upward. A slight
click will be felt when tabs have engaged cam lock.
Valve should be pointed towards rear of vehicle.
(2) Connect PCV line/hose and rubber hose to PCV
valve.
EVAPORATIVE EMISSIONS
VACUUM LINES
DESCRIPTION
A vacuum line schematic for emission related items
can be found on the Vehicle Emission Control Infor-
mation (VECI) label. For label location, refer to Vehi-
cle Emission Control Information (VECI) Label.
VAPOR CANISTER
DESCRIPTION
A maintenance free, EVAP canister is used on all
vehicles. The EVAP canister is located under the
vehicle, inside the left frame rail, in front of the fuel
tank (Fig. 24).
Fig. 24 EVAP Canister Location
1 - LEFT FRAME RAIL
2 - RUBBER GROMMETS (2)
3 - LOCATING PINS (2)
4 - EVAP CANISTER
5 - MOUNTING NUT
6 - MOUNTING BRACKET

OPERATION

The EVAP canister is filled with granules of an
activated carbon mixture. Fuel vapors entering the
EVAP canister are absorbed by the charcoal granules.
Fuel tank pressure vents into the EVAP canister.
Fuel vapors are temporarily held in the canister until
they can be drawn into the intake manifold. The duty
cycle EVAP canister purge solenoid allows the EVAP
canister to be purged at predetermined times and at
certain engine operating conditions.
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