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.

[malcolm2]

AC.net is out of business, but bought the new idf 40s before they shut down. paid for the cleaning and set up per his recommendation.... 12mm on float level. not sure why it is different than the book, but it is. I re-checked the 12mm when I installed the viton needle valve.

Yes, I have lots of tests to try on this. I did remove the regulator and left the gauge. Really did not see any change to the gauge readings. I start the bus.... I see 2.5 psi, i take a drive. I stop and check the gauge, it is down to 1 or 1.5 psi.

So there are a couple things going on...... 1. the random siphon activity and 2. the low driving pressure.

This whole thing started with the siphon activity. I will re-route the hoses 1st. easy to try.

Then I will change the pump and see if my pressure holds. Might try a Facet pump as recommended above.

All test suggestions are welcome, as thing proceed, I will certainly try anything.

I might be one of the only people to remove carbs and go to L-Jet. (IMG:style_emoticons/default/headbang.gif)