I rebuilt the carburettor on my 1934 Buick, and now seem to have an issue with the accelerator pump. Using the accelerator pedal, I don't get a good 'squirt' of fuel into the carb, if I manipulate the accelerator pump by hand, it seems OK. Not sure what the problem is, and currently can't find the old parts to see if the accelerator pump part is the same. It's as if it's out of adjustment, and if I could adjust it, it would then be OK. Any suggestions appreciated.