okay to start things off i have a 2004 rx8 with 75k miles.. my car was driving perfectly fine on the way to the gym, i finish my workout and turn my car on, the engine was vibrating a little when in idle and didnt think anything of it. as i started to drive off my car/engine really started to vibrate alot and felt like i didnt have as much power when driving and was making a weird noise and the CEL started blinking, luckily the gym is only a few blocks from my house and i made it home.. the ECL sensor was also blinking.. i checked it and filled it back up.. now im home the car turns on and still has blinking CEL and is still vibrating while in idle. please any suggestions on what i should do???

 

Try searching "blinking CEL"

 

When was the last time you replaced your Ignition coils and/or Spark plugs?

I would assume you never did.