power

Hello! Years ago I replaced the stock radio with a pioneer radio, and it recently died. So I bought a new fancy CarPlay enabled radio and figured it would be a quick swap. I was wrong. It appears that maybe the radio didn't die, and maybe it's some power issue somewhere. After installing...

I have a 2.8L 98 Z3 and I really feel i'm not getting the acceleration and power from the engine that I deserve. Was wondering is there anything I can do to bring it back to the original Acceleration specs or add power etc? Possibly changing a sensor of some description? Any advice greatly...