Ok I have a 99 Camaro 3.8 and it is haveing all sorts of problems. It feels like it is running ruff when it first cranks up under idle but starts running better as it warms up. if i give the car to much peddle it will start to what feels like misfire or choke or something of that nature. I just had the cat replaced all the plugs and wires all new coils and EGR new Ecu new fuel filter and still have not solved the prolem. the car is not coding any codes at all. HELP ME PLEASE!!!