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.

[nditiz1]

My feeling here is it's getting kind of crazy and off track.

If this were my bus I'm going back to basics - float level. Also if I purchased a rotary pump that is only producing 2.5 psi then I'm not running a regulator. I'll maybe run a fuel pressure gauge inline just for sanity, but have had similar setups and just ran pump to carbs.

If you really want to test a theory, put gas in a jug attach to a gauge cap the end and raise the jug. It will tell you how much pressure you have. My guess is less than 1 psi. You can also test your needle valve by hooking the jug up to your carb top. Rest the top on the bench so the float is closed all the way. It shouldn't leak. When you set the float level did you get it to 10mm with the gasket in place and the ball not depressed? This is very important.