intermitent rough idle and sudden power loss
 

Hi everyone, I have a 05 8 with greddy turbo. Car has 92k but motor was just rebuilt by mazda. I have put maybe 20 miles on it since getting it back. Anyways car seems to run good at first, then maybe after 20 minutes of driving i get a rough idle when coming to stop. Sometimes it dies sometimes it dosent.

I have changed the coils, plugs, cleaned the MAF sensor, cleaned the ess, and reset the ess.

Today i drove her around the block and after 10 minutes of driving, car decided to just lose power all of a sudden. Car stayed on but the idle stayed around 3k, and the car wouldnt move at all. Shut it down and i started it again ( car started right up) but still was doing the same thing. I waited 10 minutes and tried again, and everything was fine again. It idled smooth, and didn't die out, i was only 3 blocks away from home so i made my way back. (This also happened yesterday)

Any help or info on what the problem might be is greatly appreciated.

My advice: They obviously effed up if this wasn't happening before. It's their problem, not yours. Take it back and make sure they fix it.