I have a 455 olds jet that has two 32 gallon fuel tanks. The Port side works great. When I switch it over to the starboard side the engine starves and stalls. I drained the tank and refilled with fresh gas. I blew out the tank with air and it is not blocked. The air blew right through and I could hear the gas bubble from the air. Any ideas why the starboard side is not working, but the port side works perfect. Also the starboard gas gauge does not seem to be working. I do have about 10 or 11 gallons of gas on the starboard tank