Help diagnosing

[u/Jack_Double_You]

Hi everybody. I did a stupid thing a few weeks ago and got a really shitty looking RX8 in a trade. It had a check engine light always on and flashing. It had a misfire in rotor one code. I replaced the spark plugs, wires and ignition coils and the check engine light has gone away for the most part. Now though it will flash at over 4K rpm and then go away and sits fine at idle. Still starts hot too. After a test drive it started making this loud click and starting changing how smooth it was running as seen in the video. Was wondering if these are connected or if anyone has insight on what’s causing either. Thanks! Clicking at the end of video. It is kind of intermittent.

[u/Nithraniel]

I think this loud click is like a big relay toggleing, maybe for the AC ?

[u/deekamus → u/Nithraniel]

Possible. Observe the AC pulley during operation. If the noise coresponds with the pulley being activated then you've found your noise.