To prevent gasoline vapors from being vented into the atmosphere, an evaporative emission system captures the vapors and stores them in a charcoal filled canister.
The charcoal canister vacuum lines, fittings, and connections should be checked every 6,000 miles for clogging, pinching, looseness, etc. Clean or replace components as necessary. If the canister is clogged, it may be cleaned using low pressure compressed air, as shown.
The entire canister should be replaced every six years or 60,000 miles.
REMOVAL & INSTALLATION
- Remove all necessary components in order to gain access to the charcoal canister.
- Disconnect and tag the vapor hoses going into the canister. With the vapor lines disconnected, inspect the canister as follows:
- Plug pipe A with your finger and blow compressed air (43 psi) through pipe B (fuel tank side).
- Check to see that air comes out of the bottom of the pipe without resistance.
- There should also be no activated charcoal coming out.
Never attempt to wash the charcoal canister.
- Remove the canister retaining bolts and band, if so equipped.
- Installation is the reverse order of the removal procedure.