Hey all, I've been fighting flooding when the car turns off ever since I got my maverick going. I tried an inline regulator which didn't work, then I tried a vented fuel filter which is where I'm at now. The vented fuel filter solved the flooding issue, but at random now is starves the carb of gas. I have the vent line teed into the feed line to the fuel pump as there is no return or vent line to the tank. The car only seems to be happy when the vent port is at the very top which makes sense but even then it'll run totally fine or not at all. Just looking for some possible solutions. I really don't want to change up the metal fuel line of possible because it's original and the car is incredibly clean and original. I saw something called a filter king pressure regulator that looked interesting and wondering if anybody has run one in the past. Thanks!
I would start by buying new float. Did you orifice that vent line ? Start by insulating all metal line in engine compartment with fiberglass, foil faced sleeve. I'm afraid the flooding at extended idle and at restart is a tougher problem. It is boiling off to a vapor.
... or you could start simple, persistent carb flooding sometimes can be attributed to fuel tank, pickup screen or rubber line deterioration unseen particulates in fuel supply / inlet needle . Could try carb kit / fuel inlet needle valve then adding typical clear fuel filters before and after pump. If a regulator is really needed somethings whacky, carb inlet should shut tight to mechanical pump pressure after shutdown . . . . RBS is low height Carter carb needed for the low hood clearance on top of 'stroker 200' - 250 cid small block's raised deck height. ( WTF is a 'vented fuel filter' ? ) . . . have fun . '74 250 small block six Maverick : .
Fuel filter with vapor return. Some have an orifice to provide a metered bleed to prevent vapor lock. If the fuel boils away after shutdown. The intake tract is now "flooded" with vapor, residual fuel pressure now flows in as float lowers. Then upon extended cranking, flooding clears, then dies because the bowl is temporarily empty.
