What would cause my 91 s10 to flood out? - 1991 Chevrolet S-10

It could be the throttle body itself that is worn out. There is something called the throttle positioning sensor that regulates how much gas is dumped into the motor for six cylinders to run on either at idle or going down the road. I had the same issue with my 90 blazer that died on me on the road and would not start because it was flooded.