Vacuum Lines; Diagnosis And Testing - Vacuum Schematics; Vapor Canister - Dodge 2001 Ram 1500 Owner's Manual

BR/BE
PCV VALVE (Continued)
(5) Replace the PCV valve and retest the system if
it does not operate as described in the preceding
tests. Do not attempt to clean the old PCV valve.
(6) If the paper is not held against the opening in
valve cover after new valve is installed, the PCV
valve hose may be restricted and must be replaced.
The passage in the intake manifold must also be
checked and cleaned.
(7) To clean the intake manifold fitting, turn a 1/4
inch drill (by hand) through the fitting to dislodge
any solid particles. Blow out the fitting with shop air.
If necessary, use a smaller drill to avoid removing
any metal from the fitting.

VACUUM LINES

DIAGNOSIS AND TESTING - VACUUM
SCHEMATICS
A vacuum schematic for emission related items can
be found on the VECI label. Refer to Vehicle Emis-
sion Control Information (VECI) Label in this group
for label location.

VAPOR CANISTER

DESCRIPTION
Two, maintenance free, EVAP canisters are used
with all 3.9L/5.2L/5.9L/8.0L
engines. Both canisters are mounted to a bracket
located below rear of vehicle cab on outside of right
frame rail (Fig. 12).
OPERATION
Two, maintenance free, EVAP canisters are used
with all 3.9L/5.2L/5.9L/8.0L
engines.The EVAP canisters are filled with granules
of an activated carbon mixture. Fuel vapors entering
the EVAP canisters are absorbed by the charcoal
granules.
Fuel tank pressure vents into the EVAP canisters.
Fuel vapors are temporarily held in the canisters
until they can be drawn into the intake manifold.
The duty cycle EVAP canister purge solenoid allows
the EVAP canisters to be purged at predetermined
times and at certain engine operating conditions.
REMOVAL
Two EVAP canisters are used. Both canisters are
mounted to a bracket located below rear of vehicle
cab on outside of right frame rail (Fig. 13).
(1) Remove fuel tubes/lines at each EVAP canister.
Note location of tubes/lines before removal for easier
installation.
gasoline powered
gasoline powered
EVAPORATIVE EMISSIONS
Fig. 12 Location of EVAP Canisters
1 - MOUNTING NUTS
2 - FRAME RAIL (RIGHT)
3 - FRONT EVAP CANISTER
4 - REAR EVAP CANISTER
Fig. 13 EVAP Canister Location
1 - MOUNTING NUTS
2 - FRAME RAIL (RIGHT)
3 - FRONT EVAP CANISTER
4 - REAR EVAP CANISTER
(2) Remove mounting nuts at each canister (Fig.
13).
(3) Remove each canister from mounting bracket.
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