[THEFERMANATOR]

The restriction sensor only goes off if there is roughly 8-10"s of vacuum present in the fuel supply line. If you pump the primer bulb up to pressure then there will be no vacuum as you'll have pressure instead. The rough running could just be the gas in the carbs has mostly evaporated and left the oil behind. This is common if you let the engine sit for 2 or 3 weeks or longer with fuel left in the carbs. If both of the wires from the fuel sensor are grounded, then it is obviously not connected. Does your horn normally sound for a second when you turn the key on? If so then you have a 3 wire horn. They can malfunction and alarm even though there isn't a request for it to sound.