This is what I have changed so far. Fuel pressure regulator, Fuel injectors, fuel pump, fuel filter, IAC, coil, checked all vacuume lines, cleaned the MAF, adjusted the TPS, played with the timing, checked plug wires, changed plugs, and it still runs the same. If the car runs for about 5-10 minutes it wont backfire or load up. Even if I drive for an hour I still have to let it run for 5-10 minutes before I take off. If I start it then take off it will drive fine for the first 5 minutes then it starts missing, backfiring, running like crap. This all happens for about 5 minutes. Then it seems like it cleans its self out and you can feel it clear out. After it clears out it will run fine all day long as long as the car stays running. once you shut it off then it starts over again. Thats even if you shut it off for a second. I have alot of time and money in this car and would love to have it running right. any suggestions is greatly appreciated.