To reduce hydrocarbon emissions, evaporated fuel is routed through the charcoal canister into the intake manifold where it is used for combustion in the cylinders. No liquid fuel should reach the canister.
- Note which pipe connections on the canister the vacuum lines go to and disconnect them. This can be done easily with lettered or numbered strips of masking tape.
- Remove the charcoal canister.
The canister should be checked for clogging and a stuck check valve as follows:
- Place your finger over port C on the canister.
- Using low pressure compressed air, blow into port B and see if air without resistance comes out port A. No charcoal should come out.
- If the air does not flow as outlined, replace the canister.
- The charcoal canister vacuum lines and pipe connections should be checked for clogging, pinching, looseness and cracks. Replace all damaged vacuum lines.
- Install the charcoal canister and connect the canister hoses to their proper connections.