Well we have my MK4 roadster up and running after 2 years. Have gone on a few short trips to break her in. We have a 302 blueprint engine with a performance cam and a Holley 600 carburetor.
We have a problem at the stop light. When the light changes I ease down on the throttle and sometimes the engine hesitates as I am moving the car into the traffic. I have been able to stop it from shutting off by babying the throttle. We have a brand new 600 CFM Holly from Blueprint. I think my problem might be an over active carburetor fuel pump. I think it might be pumping excessive fuel into the intake manifold before the butterfly opens enough to allow the proper amount of air fuel mixture. I know that adjusting the carburetor fuel pump procedure is setting the set screw barely touching the control arm for the fuel pump. I have watched a lot of you tube carburetor adjustment videos and one guy actually adjusted the fuel pump a little different. He used a .030 shim to adjust the distance between the adjust screw and the fuel pump control arm. I was thinking this might give the butterfly a chance to open a little more before the fuel in pumped into the intake manifold. I am not a carburetor man but this seems to make some sense. Tell me if I am wrong and if so tell me another way I could fix this hesitation problem . Any help would be appreciated because this could be a serious problem when you are maneuvering in traffic.
Thanks very much
Cleve