How to check the Charcoal Canister Return Fuel System.
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This how to check the Closed Fuel Evaporation system on the Suzuki Samurai, Jimny, SJ413, SJ410 or JA51. Most cars are basically the same. You feed air into the side of the Fuel Charcoal Canister on the side that come from the fuel tank and check for air that comes out the other side. The principle, on how this works, is that fuel that would have evaporated into the atmosphere that used a vented gas cap, is captured in the Charcoal Canister an either returned to the gas/fuel tank or used by the engine directly from the Charcoal Canister itself. This part of the emissions system. On all 1996 cars and newer the engine diagnostic system would display a code for a problem with the fuel evaporation system is the charcoal canister is clogged. This is how to check the charcoal canister by using compressed air. This is a very easy simple method to check if the evaporator charcoal canister is clogged.
