EVAP Canister Check
WARNING:
Do not allow smoking or use of open flames in area where work on fuel system is taking place. Anytime work is being done on fuel system, disconnect negative battery cable, except for those tests where battery voltage is required.
CAUTION:
Whenever fuel line fittings are loosened or removed, wrap a shop cloth around the fitting and have an approved container available to collect any fuel.
An improperly functioning EVAP canister can cause problems with engine driveability and/or vehicle refueling. The canister can become plugged (with some internal obstruction or liquid fuel) or develop an air leak.
Stalling or poor driveability can be caused by fuel saturated canister.
- Disconnect EVAP canister purge line at the underbody and look for liquid fuel in the line.
- If liquid fuel is present, install a siphon hose on this line and attempt to draw out more fuel.
NOTE: If liquid fuel is present in canister, it must be replaced.- If fuel is in canister, investigate vapor venting of system. See DIAGNOSING FUEL FILL PROBLEMS .
- EVAP purge solenoid function. Check for DTCs and refer to the appropriate code in Engine/Emissions Controls section of this service manual.
Evidence of fuel loss or fuel vapor odor can be caused by:
- Cracked or damaged EVAP canister.
- Fuel saturated EVAP canister (evaluate as noted above).