It's been a few years since I've build a Carter BBD but my car has been running rough lately so I thought I'd throw a kit in it. Not sure what I did wrong but the car doesn't want to idle below something like 1300rpm and it kind of surges now. Definitely not in a drivable state.
The only adjustments I made were float, step up piston, accelerator pump and bowl vent adjustments.
For the float I turned the carb over and adjusted the float so it was 1/4" from the crown of the float to the surface of the fuel bowl. That one seemed easy enough.
For the step up piston I put the carb back together, pressed the step up piston all the way down and then put moderate pressure on that plastic tab while I tightened the screw.
Accelerator pump I put the idle screw at curb idle, set the accelerator pump so it's 1/2" from the top of the "air horn" as the service manual states. I set the pump so it was 1/2" from the lip of the carb where the red arrow in the picture is pointing. Is this correct?
Bowl vent had me slightly confused. Service manual states there should be an .080" gap between the bowl vent valve and seat. Does this basically mean the bowl vent should be .080" open while at curb idle? If so, as you can see the lever the green arrow is pointing to in the picture is not even touching the plastic piece, so it looks like it's closed all the time. Is the adjustment asking me to bend that lever down to make contact with the plastic so the bowl vent is open .080" at curb idle?
I'm thinking it's an accelerator pump issue but I feel like that adjustment was pretty straight forward. What do you guys think could be causing this? Thanks.
