A couple of nth ago I bought a 2004 aveo, timing belt snapped so I removed the head, installed the new valves and put everything back together, now the car won't start unless I put gas down the intake, after that it will start up and stay running until I turn off the key, while it is running it runs extremely rich, and when I drive it down the road it will not shift gear until it hits the redline, before the timing belt broke it ran great, and direction or ideas would be great