Vapor Storage Canister, Fuel Injected Engines

Fig. 65 Purge valve type canister. 1985-87 4-151 engines w/fuel injection:

Fig. 66 Charcoal canister. 1987 4-151 & V6-173:

Fig. 67 Evaporative emission control system. 1987 V6-173:

Fig. 68 Charcoal canister. 1986 V6-262:

Fig. 69 Charcoal canister. 1987 V6-262, V8-305, 350 & 454 except high altitude:

Fig. 70 Charcoal canister. 1987 V6-262, V8-305, 350 & 454 high alt.:

These systems Figs. 65 through 70, transfer fuel vapor from the fuel tank to an activated charcoal canister to hold the vapors when vehicle is not running. When engine is running, fuel vapor is purged from the charcoal canister by intake air flow and consumed during normal combustion. The fuel tank has a non-vented fuel cap and a single vent pipe to the canister.

Fig. 68 Charcoal canister. 1986 V6-262:

1985-86 V6-262 Engines
Fuel vapors from the fuel tank flow into the tube labeled ``Fuel Tank'' and are absorbed by the charcoal in the canister. The canister Fig. 68, is purged when engine is running above idle speed. Vacuum is applied to the tube labeled ``Canister Purge'' to draw fresh air through bottom of canister. The air mixes with vapor and mixture is drawn into intake manifold to be consumed during normal combustion.