Yah, Nubie, I tried that. Good logic. I may have found something though. Take a look at the carb on your Alpha, then look at the fuel tank. Notice that the fuel tank is almost 1/2" lower than the carb. I think I am fighting a fuel feed problem of some sort the Evo may want the fuel supply down lower to run properly. Maybe I need a check valve on the fuel line, or on the pressure line from the exhaust. Maybe someone here has a good idea of what to do....