It will stay running once it is warmed up, yet I have to rev it up for a few minutes before it will run/idle on it's own. I'm turning it into a race car for a compact car division at the local race track. The person I bought it from told us that it sat for three years or more. It sounds like water in the tank, but I've already put dry gas in it. Does it need carburatuer cleaner? New plug wires? What can I do to help it start better?