Last race I was at my 81 Rx-7 started missing all of a sudden, like it was out of gas. I barely made it back to the pits where the car shut off and would not start up. It was not out of gas, but seemed to be getting to much fuel in the carb and as a result it was flooding. I could see some fuel sitting on the bottom of carb. Any suggestions on how to fix this or things to check as to find the cause?