I just got my 2010 RX8 and it was idling rough so I changed the sparkplugs. They were really bad so I thought it would be so much better until I tried to start it and it had no spark. Then I replaced the spark wires hoping that was the issue but it still won't start. Any wisdom will help please help me.

 

Did it do anything when you tried to start it? Does it turn over?
Are all the fuses OK? Did you connect the correct coils to the correct spark plugs?

Changing old spark plugs is a good move, but you'll want to make really sure you ignition coils are fresh. That's the silent killer.

 

Make sure the wires are attached to the right coils. It's possible it's just flooded if they are hooked up properly. Try deflood procedure to get it running. Then you'll want to do a compression test.