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.

[Superhawk996]

Here is the thing- fuel tank on a 914 is lower than the fuel inlet on the IDFs.

So with the car turned off, and no fuel pump running, there isn’t much of a fuel supply to bleed into the bowls (even with a stuck needle valve). The only fuel available is what is in the crossover that connects the two carbs.

Are you sure your fuel tank is properly vented and not building up pressure to drive fuel from the tank up to the carbs?

How big of a puddle? Larger than what can be contained in the crossover hose?