I have two problems. The first being: I have a 2BBL Holley carb (fresh rebuild) that has an open vacuum port (threaded fitting), on the bottom-left corner beside the choke. This port was NOT plugged, or plumbed into anything. Should it be drawing vacuum or not?
Secondly: With this obvious vacuum...
Hi guys! I've got a rough/surging idle question. The engine is a 3.0 liter GM, with a 2bbl.Holley carb. I bought the boat from a dealer, where it had been sitting for several years. After replacing all the filters, spark plugs, distributor cap, rotor, and wires, I still have a "surging idle"...