My P0302 Misfire experience and solution

Just posting this P0302 experience of mine so it can help someone who doesn't have massive amounts of time to search.....



I have a 2005 RX-8 with 63,000 miles.



I replaced the Ignition coils, wires and plugs at 60,000 during a tune up.



With only 3,000 miles since my tune up, my car was starting to lose gas mileage and was taking more time getting started, whether on a cold or warm engine. Just recently, my 8 started to have problems in the street.



While I was driving, all of a sudden, my engine started to sputter and the engine noise switched between two different tones. I had intermittent power and the revs were not smooth when accelerating from a stop. While stopped I would sometimes stall, my idle was rough. I did not get a CEL untill this had been happening for at least 1 hour. At first the CEL would blink and then it would be on steady. Restarting the car sounded like it was almost flooded and it would crank for a very long time.



I got the CEL scanned at Autozone and it came up as a P0302 (rear rotor misfire).



I swapped ignition coils on the rear rotor and my problem was solved. Turns out one of the coils I bought for my tune up were defective.



So if you're having these symptoms I hope you find this post helpful.