Iv got a s2 r33 and about a month ago after driving it in the morning by the afternoon the car sounded like wrx, so horrible miss to dropping a cyclinder. I changed the coil packs to yellow jackets, new spark plugs, new coilpack loom and a new oxy sensor. Car ran sweet for about 3 weeks better then ever, more power ect. All of a sudden driving her today started her up after driving from one place to another and it started a lil strange like it did the first time it happened. Turn key and its startes with a bit of a bang like too much fuel, so a high rmp start somehow and then back to sounding like a wrx. Only time car sounds normal is on the coats down from reving the car. I am now stumped so need some help