Evaporative Emission Control Canister: Testing and Inspection

An improperly functioning EVAP canister can cause problems with engine drive ability and/or vehicle refueling. The canister can become plugged (with some internal obstruction or liquid fuel) or develop an air leak.

^ Stalling or poor drive ability can be caused by:
1. Fuel saturated canister. Disconnect the EVAP canister purge line at the underbody (near the fuel filter/regulator) and look for liquid fuel in the line.
a. If liquid fuel is present, install a siphon hose on this line and attempt to draw out more fuel.

IMPORTANT: If liquid fuel is present, the canister must be replaced.

b. If fuel is in the canister, investigate the vapor venting of the system. Refer to "Diagnosing Fuel Filling Problems". Diagnosing Fuel Fill Problems
2. No canister purge function. Check DTC codes for P0446 and refer to this code in "PCMD".

^ Evidence of fuel loss or fuel vapor odor can be caused by:
1. Cracked or damaged EVAP canister.
2. Fuel saturated EVAP canister (evaluate as noted above).