Well i done the carb kit on the 4.3,(87 4-winns) and evrything is great EXCEPT there is vacuum leak at the air/fuel adj screw..Engine has just slight miss(vacuum leak),when i was adj air/fuel screw i heard it and felt it blowing air..I take and wiggle screw and it sounds like thats where its coming from..Any suggestions??Anyone ever have this problem??Thanks
