Dodge Ram Truck 1500-2500-3500. Manual — part 2091
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
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EVAPORATIVE EMISSIONS
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Two EVAP canisters are used. Depending on vehicle model and fuel tank size, the canisters may be mounted either
vertically or horizontally. These maintenance free, EVAP canisters (5) are located near the front of the fuel tank.
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EVAPORATIVE EMISSIONS
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Type 1 Canisters
Use the following procedure for vertically mounted canisters.
1. Raise and support vehicle.
2. Certain models, equipped with a certain fuel tank size, may require the removal of the fuel tank skid plate and/or
the transfer case skid plate to gain access to the EVAP canister(s). Remove necessary skid plates.
3. Remove fuel tubes/lines at each EVAP canister. Note location of tubes/lines before removal for easier installation.
4. Remove lower support bracket (4).
5. Remove mounting nuts (1) at top of each canister.
6. Remove each canister from upper support bracket.
Type 2 Canisters
Use the following procedure for horizontally mounted canisters.
1. Raise and support vehicle.
2. Certain models, equipped with a certain fuel tank size, may require the removal of the fuel tank skid plate and/or
the transfer case skid plate to gain access to the EVAP canister(s). Remove necessary skid plates.
1 - CANISTER MOUNTING NUTS
2 - CONNECTING HOSE
3 - UPPER SUPPORT BRACKET
4 - LOWER SUPPORT BRACKET
5 - OUTER CANISTER
6 - INNER CANISTER
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EVAPORATIVE EMISSIONS
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3. Remove fuel tubes/lines (1) at each EVAP canister.
Note location of tubes/lines before removal for eas-
ier installation. Remove bolts (6).
4. Remove nut (1) and remove NVLD filter (2).
DR/DH
EVAPORATIVE EMISSIONS
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