Thagoldenb

I'm having problems starting my car after it has been driven for a while. It will start right up with one crank if the car has been sitting but when i try to start it after it was just driven it doesn't want to fire up at all. I have checked the fuel pump, fuel regulator, fuel pressure, and main relay. Newer starter, plugs, wires and brand new distributor. I got my car retuned about a week ago and it had the same problem on the dyno so we pulled the coolant temp sensor plug off and it started up right away with no hesitation so we thought that was it so I replaced it and its still having the same issue. Almost seems like the car is flooding out. Has anyone else had a problem like this? Any input is great! thanks!