why won't my truck start when the engine is warm? Starts fine cold and runs fine

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Shut off truck after driving it will not restart until it cools off. It doesn't overheat and it cranks fine no drag just won't start. Here is what I know. F/p was bad replaced pump and sending unit, fuel filter, pressure regulator and TPS. Pressure and injector pulse are good even on no start. Replaced plugs and wires, rotor, dist. cap, ICM, coil. Fire is good even during no start. It runs fine until I shut it off and it has fuel and fire when it won't start. It is not showing any codes at all. I tried taking the computer out of the ignition loop by removing the jumper but it makes no difference.