Dual Weber IDF 40s, Carb Rookie question... Options

[malcolm2]

Hello everyone. I will preface by saying that this is an engine from a 914. (IMG:style_emoticons/default/piratenanner.gif)

But it is in my VW Bus. Just now getting it moving down the road. Everything is new.

Carbs are new and I am a carb rookie, as well. Bought them from Aircooled.net and had them cleaned and set-up for the bus. My 914 has L-Jet FI, this group has taught me enough about that system to be dangerous.

So here is my question for the carb experts. What should the Pump Valve spray look like? It seems erratic and drippy. It kicks in 1st as I open the throttle, not a spray but pore, really. I will say that I see that in all 4.

[Superhawk996]

You’re running way too rich

Have you verified that the throttle plate is closed, covering the 1st transition port when the idle speed screws aren’t even touching the linkage?

This is Hugely important.

If you have done that then I suspect the idle mix isn’t being adjusted properly for best lean idle

OR

You will need to go down on idle jet size

[malcolm2]

You’re running way too rich

Have you verified that the throttle plate is closed, covering the 1st transition port when the idle speed screws aren’t even touching the linkage?

This is Hugely important.

If you have done that then I suspect the idle mix isn’t being adjusted properly for best lean idle



You will need to go down on idle jet size

Only way to verify now is that the speed screw is hitting the bracket. I did look at it when it was on the bench. Fully closed. Several little holes in the barrel under the plate. Seemed closed to me.

Remember, this pic is from idling all day and setting and resetting screws. All that. They look a bit lean to me. Gray??