Fuel filling the charcoal canister is almost certainly from one or other
float valves failing to close, and would have been accompanied by continual
clicking of the pump with the engine not yet started. The only other way
would be via the fuel tank vent pipe if fuel could somehow be forced into a
full tank, which seems unlikely.
Happening with replaced floats and valves points more to dirty fuel than
anything else, do you have a filter before the carbs? Standard for HIFs
which North America got with the first 18V engines for the 1971 model year,
and maybe earlier.
Unless you have a non-standard pump which may be overwhelming the float
valves.
Alternatively if it only happens when driving it could be vibration causing
the valves to open.
PaulH.
----- Original Message -----
> 71 mgb. A few years ago after the first startup in the Spring, I drove
> around the neighborhood to check things out. The car bogged down and I
> struggled to get home. Fuel had filled the charcoal canister and running
> out the bottom. The original floats showed some wear on the pivots, but
> not so much that I thought it would be the problem. Couldnâ??t find anything
> else so replaced the floats and valves and it has been fine since. This
> year I didnâ??t start up until May or June, same thing happened.
>
> Checked everything, no blockage, debris, worn parts. An internet posting
> mentioned the pipe union (near the fuel pump) that connects the charcoal
> canister to the â??widgetâ?? in the trunk. That too was clean. Purged the
> charcoal of gasoline (see John Twist) put it all back together. Fuel pump
> ticks briskly and stops before starting. Iâ??ve driven around the
> neighborhood a couple more times and it seems fine. Not being able to find
> a cause and fix it leaves me worried about longer drives. Any thoughts?
_______________________________________________
Mgs@autox.team.net
Donate: http://www.team.net/donate.html
Suggested annual donation $12.75
Archive: http://www.team.net/pipermail/mgs http://autox.team.net/archive
Unsubscribe: http://autox.team.net/mailman/options/mgs/mharc@autox.team.net
|