Description; Installation; Fuel Filler Cap; Operation - Dodge Dakota Sport 2001 Service Manual

AN
EVAP/PURGE SOLENOID (Continued)
Fig. 2 Duty Cycle EVAP Canister Purge Solenoid
1 - BRACKET NUTS (2)
2 - EVAP CANISTER PURGE SOLENOID
3 - EVAP SYSTEM TEST PORT (IF EQUIPPED)
4 - VACUUM LINES
5 - ELECTRICAL CONNECTOR
Fig. 3 Duty Cycle EVAP Canister Purge Solenoid—
2.5L Engine
1 - DUTY CYCLE SOLENOID
2 - CYLINDER HEAD COVER
3 - VACUUM HOSES
4 - BRACKET NUTS (2)

INSTALLATION

3.9/5.2/5.9L Engines: The duty cycle EVAP canister
purge solenoid is located at left-rear side of engine com-
partment near power brake vacuum unit (Fig. 2).
EVAPORATIVE EMISSIONS
2.5L Engine: The solenoid is located at right-rear
side of engine compartment (Fig. 3).
(1) Position EVAP canister purge solenoid and its
mounting bracket.
(2) Install mounting nuts and tighten to 8 N·m (75
in. lbs.) torque.
(3) Connect vacuum harness and wiring connector.

FUEL FILLER CAP

DESCRIPTION

The plastic fuel tank filler tube cap is threaded
onto the end of the fuel fill tube. Certain models are
equipped with a 1/4 turn cap.

OPERATION

The loss of any fuel or vapor out of fuel filler tube
is prevented by the use of a pressure-vacuum fuel fill
cap. Relief valves inside the cap will release fuel tank
pressure at predetermined pressures. Fuel tank vac-
uum will also be released at predetermined values.
This cap must be replaced by a similar unit if
replacement is necessary. This is in order for the sys-
tem to remain effective.
CAUTION: Remove fill cap before servicing any fuel
system component to relieve tank pressure. If
equipped with a California emissions package and a
Leak Detection Pump (LDP), the cap must be tight-
ened securely. If cap is left loose, a Diagnostic
Trouble Code (DTC) may be set.
REMOVAL/INSTALLATION
If replacement of the 1/4 turn fuel tank filler tube
cap is necessary, it must be replaced with an identi-
cal cap to be sure of correct system operation.
CAUTION: Remove the fuel tank filler tube cap to
relieve fuel tank pressure. The cap must be
removed prior to disconnecting any fuel system
component or before draining the fuel tank.

LEAK DETECTION PUMP

DESCRIPTION
The Leak Detection Pump (LDP) is used only with
certain emission packages.
The LDP is a device used to detect a leak in the
evaporative system.
The pump contains a 3 port solenoid, a pump that
contains a switch, a spring loaded canister vent valve
seal, 2 check valves and a spring/diaphragm.
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