I hope you get a better answer than this, but here is as much as I know. I
await other answers too, since I have a similar setup. Anyhow...
I'm not sure what you mean by "the hose from the bowl vents to the
cannister"... in my setup, they don't do that. Somebody PLEASE correct me if
I'm wrong. I've tried my best to figure out the correct layout, since the
way I bought it was obviously wrong:
http://www.bones.org/torch/photos/mgb/mechanical/carbs_whats_this.html
If I'm not mistaken, the adsorption cannister should be connected to the
valve cover. The carbs are then connected to the crankcase breather. My
understanding would be that the more-conecntrated unburnt stuff gets
recycled into the carbs and burnt, whereas the less-concentrated vapors from
the valve cover get recycled through the adsorption cannister.
Even though the canister appears normal, I think it can still be blocked,
fouled with gas varnish, oil, etc. Unfortunately a new one costs something
like $140. Maybe listers who don't believe in them have a couple to sell us
cheap? :-)
But maybe it's just an old blocked hose? Also, the cannister is part of the
larger fuel system, and thus should also be attached, via a short hose, to
the rigid pipe from the fuel tank in the rear. If any of these hoses are
old, cracked, or clogged, or the gas tank vent cap does/doesn't vent (I'm
not sure which do and which don't), etc., that could all cause problems I
guess. Here's where somebody with more knowledge steps in. :-)
The "outlet" hose you described goes to the anti-run-on valve, if I'm not
mistaken. There should also be a hose from the valve to the intake manifold
(the smaller hose mount on the valve). Finally, there should be a large hose
running from the bottom of the valve to pollute.... er, I mean, drain below
the car.
You can see these hoses here, I think (ignore the red circles - they are for
something else).
http://www.bones.org/torch/photos/mgb/mechanical/engine_compartment_1.html
Hope that helps. Somebody let me know if I'm spewing BS. :-)
-Mark
Topless Smurf ('75 MGB):
http://www.bones.org/torch/photos/mgb/mark_mgb_1.html
> -----Original Message-----
> From: owner-mgs@autox.team.net [mailto:owner-mgs@autox.team.net]On
> Behalf Of William Killeffer
> Sent: Wednesday, December 26, 2001 20:08
> To: mgs@autox.team.net
> Subject: adsorption canister hookup
>
>
> Hello Listers,
> After getting my renewed carbs back, I put them on and hooked up all the
> hoses and fuel lines. The car wouldn't start but the fuel pump worked. The
> carbs weren't getting fuel. I determined that the hose leading
> from the bowl
> vents to the canister was the problem. Unhooking it allowed the car to run
> fine. Even though my car has been desmogged otherwise, I would
> like to have
> the canister hooked up and working correctly to minimize fuel loss due to
> evaporation. I opened the canister and found it full of charcoal
> chips, but
> nothing seemed amiss. Another complication arose in that the
> canister outlet
> leads to an electric valve of some sort, which isn't hooked to anything.
> Where is it supposed to go? The car is a 1974 MGB with a 71 engine and HS4
> carbs. Thanks for the help,
>
> -William Killeffer
> 1974 MGB
> 1993 BMW 325is
> 1993 Ford Explorer
> 1997 Cheverolet S-10
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