I have been trying to figure out what is going on with my 2000 GTP. When the engine is cold the car runs like a champ. When it hits operating temperature it runs like a chump. As soon as the operating temperature is reached the car bucks like a bronco with almost any load you put on it (it like it is misfiring really bad). When you get it up to speed on the freeway it runs great as long as you do not need to accelerate. I installed new coil packs, plugs and wires before I noticed that it only happened at operating temp. I do not get any Check engine lights and no codes are being thrown. I am thinking it must be sensor related but I do not know which one to start with. I have a spare engine I could swap parts off if needed. Any recommendations where to start.