The charcoal cannister filters the air that passes into the vented
valve cover, then through the engine, out the side covers and back into
the carburettors, and it also traps gasoline vapors that would otherwise
escape to the atmosphere, allowing them to be burned, in theory, when the
engine is running.
If the engine runs better now, it's likely that the charcoal filter is
plugged and that it needs fresh charcoal. The charcoal is WalMart fish
tank material, and a new foam filter can be cut from a piece of
Scotchbrite. A fifteen-minute job to remove, disassemble, clean, cut new
pad, refill and reinstall.
My advice is to get the cannister cleaned up and reinstalled, as there
is no filtering of the air going into the engine's rocker cover without
it.
Bob
On Thu, 29 Sep 2005 23:55:24 -0400 "1971MGB" <1971mgb@cox.net> writes:
> Today I was playing around with the 71 "B" and unconsciously got it
> to run better, go figure.
> Here is what I did, I removed the charcoal filter and hoses, I have
> a vented valve cover and un-vented oil filler cap. After removal of the
items
> the car's idle was smoother, what did I do right and what sort of
problems am
> I looking at down the road.
>
> B.
> 71 MGB
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