I had been haviong this problem with cyl 3 misfire. I changed all the plugs, had the fuel injecotrs cleaned (cyl 3 was the worst of them all). It still came back as cyl 3 misfire so i swapped the coil packs on 1 and 3 and then cyl 1 misfired. The new coil pack finally came in and now he is running just fine. I sucked cause if i tried to give it gas a low RPm the car ran like crap. NOw that it is fixed she 's back to her normal self.