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what is it?
JoeBob:
At last years National Mercury show in Denver, a judge looked under my hood and saw the canister on the driver's side of the car and asked "What is it?" If you don't know what I am talking about, It connects to the air cleaner with a corrugated hose. All I could say was "hell if I know." Does anyone know?
warhead2:
I Believe that is part of the smog system. But not completely sure my 77 don't have any smog stuff
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oldkayaker:
I suspect what you are describing is the carbon canister. It collects the gas tank vapors and routes them to the engine air cleaner via a corrugated hose. See attached old photo found on the internet.
PintoTim2:
I can't find a diagram online - but the corregated line looks like a carbon canister vent. This would allow fresh air into the canister to allow it to purge the fuel vapors out. The vapors generated in the fuel tank are pushed into the carbon canister. There needs to be a vacuum source to pull them out (engine vacuum after the throttle plate) - but there also needs to be a way to not build up vacuum in the carbon cannister (hense the vent). Nowadays this is usually a short hose with a "spider trap" placed in a dry area so it doesn't zoop up water. Back in the 70s, it probably seemed like a good dry spot was the air cleaner. The line that pulls the fuel vapor into the engine is small because too much vapor would drive the engine control rich.... And yes, spiders love fuel vapors.....
PintoTim2:
oh that's funny it changed the word "s" - u - c - "k " to zoop..... If I have offended someone, then I am truely sorry ha ha
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