GM Cadillac Deville_Fleetwood_ELD_Seville 1990-1998

Evaporative Canister


To limit gasoline vapor discharge into the air when the vehicle is not operating. This system transfers fuel vapors from the fuel tank to a charcoal canister storage device. This canister absorbs fuel vapors and stores them until they can be burned in the engine. When the engine is running, the fuel vapor is purged from the carbon element by intake airflow and consumed in the normal combustion process. The EVAP purge solenoid valve allows manifold vacuum to purge the canister.

Poor idle, stalling and poor driveability can be caused by:

Hoses split, cracked, and/or not connected properly.
Damaged canister.
Malfunctioning purge solenoid.


Servicing the evaporative canister is only necessary if it is clogged, cracked, or contains liquid fuel. If replacement is necessary, the canister must be replaced as a unit; it cannot be disassembled.

Inspect the Evaporative Emission Canister for the following conditions:

Cracked or damaged
Fuel leaking from canister

If either condition is found it will be necessary to replace the canister as follows.

  1. Tag and detach all hoses connected to the charcoal canister.
  3. Unbolt the retaining bolts and then remove the canister.
  5. Install the new canister and tighten the retaining bolts.
  7. Install all hoses to the canister.