I have a 94 K1500 Z71 with 5.7 engine. My problem is when I drive the truck until it warm to normal temp them shut it off for 30 min I restart the truck and it runs like it is flooded, has no power and will not accellerate when trying to drive away. After running for a few minutes it will clear up and run OK. I have tried new injectors new o2 sensor new egr valve and new Idle control valve. New plugs and wires new complete distributor and coil. All improved the running of motor but I still have the restart problem. I'm thinking of replacing the ECM next. Anyone have a thought on what might be the problem?