about thorttle body on 1992 Chevrolet S10 Blazer

what could cause the thorttle body to dump alot of gas into it ,when you run it for a few minutes an turn it off an then try to crank it an then it dump to much gas into thorttle body ?

Asked by for the 1992 Chevrolet S10 Blazer
leaking fuel injector, bad fuel mixture solenoid, oxygen sensor.