Webber 33mm carb on at 22R

Haynes makes a Weber manual... has every Weber carb in there and how to mess with it. If I could find mine, I would gladly post info for you... alas -- it sprouted wings at some point.

Is this the carb that the HolleyWeber is based on? (a staged 2-barrel). If so, try reversing the idle jets. They screw in on each side from the outside on the HolleyWeber . I had a similar problem when I rebuilt one on a Ford 4 banger. The jets weren't marked that I could see, but they were different sizes. The other thing to check is to see that the throttle plates are closing properly. The secondary plate needs to be slightly open when the primary plate is closed. Your directions should tell you how much. Weber probably has a website. If they're like Holley, there will be good info on all the adjustments there.