Ford Mustang/Capri 1979-1988 Repair Guide

Evaporative Emissions Canister


The canister functions to cycle the fuel vapor from the fuel tank and carburetor float chamber into the intake manifold and eventually into the cylinders for combustion. The activated charcoal element within the canister acts as a storage device for the fuel vapor at times when the engine operating condition will not permit fuel vapor to burn efficiently.


See Figures 1 and 2

Since the canister is purged of fumes when the engine is operating, no real maintenance is required. The only required service for the evaporative emissions canister is inspection at the specified intervals. The canister should be visually checked for cracks, loose connections, or other defects. If the charcoal element is gummed up, the entire canister should be replaced. To remove the canister, label and disconnect the canister purge hose(s), loosen the canister retaining bracket and lift out the canister. Installation is the reverse of removal.

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Fig. Fig. 1: Evaporative emissions canister

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Fig. Fig. 2: Disconnect the canister purge hose(s) at the top of the canister