Weber 40 IDF is dripping Options

[malcolm2]

Nice day for a drive yesterday.... Drove some, filled up with gas and drove a bit more.



Woke up this morning to smell gas in the garage and noticed a pool of fuel on the floor.

I removed the air filter and see a drip in one barrel. 1 barrel is very wet and even has a pool sitting on one side of the plate. The others are wet, so they could be dripping, but less frequent. You know gas, it will evaporate pretty quick.

looks to be coming from the center of #14, Aux Venturi. I removed the Main Jet on that barrel (47 - 50), hoping to get it to stop dripping. I think it stopped.

What is causing this? (IMG:style_emoticons/default/WTF.gif)

I should add that Dual Carbs are new, set up at AC.net... now out of business. Last summer I fully adjusted, and sync'd them. Had been running really well, parked for about a month. Total of about 800 miles on the whole rebuild.

[Nogoodwithusernames]

You sure those venting lines are clear and not plugged up? It's pretty common on the T3 (not the van T3, the Squareback, Notchback, Fastback T3) for the fuel tank vent lines to get plugged up with rust and junk.

Also on Pg.1 you note that you have those two vent lines connected together which will effectively NOT vent the tank FYI. It's just a closed loop at that point.

I am not familiar with the bus evap system, but on the T3 the vent lines went back to the engine after the charcoal canister and it would pull those fumes into the intake system. I used a kit Jim Adney makes to bypass all that since it is more than likely plugged up anyways, so my tank is open to atmosphere now. The canister on the T3 also tends to collect crap from the road and cause rust under the fender so that was extra motivation.