EVAP Canister
EVAP Canister (All Except NAS)
| Item Number | Description |
|---|---|
| 1 | FPDM (fuel pump driver module) mounting bracket |
| 2 | Atmospheric vent |
| 3 | Connector for vapor pipe to EVAP canister purge valve |
| 4 | Connector for vapor pipe from fuel tank |
EVAP Canister (NAS)
| Item Number | Description |
|---|---|
| 1 | FPDM mounting bracket |
| 2 | Connector for DMTL pump |
| 3 | DMTL pump bracket |
| 4 | Connector for vapor pipe to EVAP canister purge valve |
| 5 | Connector for vapor pipe from fuel tank |
The evaporative emission (EVAP) canister is located immediately behind the fuel tank. Two bolts attach the evaporative emission (EVAP) canister to the underside of the center floor section.
The evaporative emission (EVAP) canister contains a bed of activated charcoal or carbon. The charcoal is produced using special manufacturing techniques to treat the charcoal with oxygen. The oxygen treatment opens up millions of pores between the carbon atoms resulting in a highly porous charcoal with a very large effective surface area which is capable of absorbing large quantities of fuel vapor. Once treated the charcoal is known as 'activated' carbon or charcoal. The evaporative emission (EVAP) canister on NAS vehicles uses a higher grade of charcoal to meet the stricter emissions' regulations.
A mounting bracket on the right-hand (RH) end of the evaporative emission (EVAP) canister contains the fuel pump driver module (FPDM). For additional information, refer to 310-01 Fuel Tank and Lines.
On all except NAS vehicles, the evaporative emission (EVAP) canister has a capacity of 1400 cc (85.4 in.3 ). Two connectors on the evaporative emission (EVAP) canister allow for the attachment of the vapor pipe from the fuel tank and the vapor pipe to the evaporative emission (EVAP) canister purge valve. An atmospheric vent is located on the underside of the evaporative emission (EVAP).
On NAS vehicles, the evaporative emission (EVAP) canister has a capacity of 3000 cc (183 in.3 ). Three connectors on the evaporative emission (EVAP) canister allow for the attachment of the vapor pipe from the fuel tank, the vapor pipe to the evaporative emission (EVAP) canister purge valve and the DMTL pump.