NewtoRotary

I did a compression test for my rx8, ever since it feels as if its gotten much worse, it misfires in first gear. Also when switching gears , i can acctually hear the gear being switched within the car. a thud noise comes up, what should i do? i also changed spark plugs coils and wires and still misfiring, all with the mazda recommended.

9krpmrx8

iTrader: (46)

You should post this in the troubleshooting subforum.

alnielsen

iTrader: (4)

You really haven't given us many details to work with.
You can try switching gas stations or moving to a lower grade of gas. It worked for me.
I was buying gas near where I work. Not a lot of cars using premium there. I believe the gas went bad. I switched to regular and I haven't had anymore problems. When I'm near my home I can fill with premium.