BMW E46 Performance Issues
So I am new to the BMW world. I'm a Volvo tech so
a lot of things translate but I've never encountered
an issue like this before. Basically the car runs
great if I am just driving normally. If I run the car
hard, I can notice a lack of power. At about 5k rpm
at full throttle (usually 2nd or 3rd gear) it will
severely bog down and will have a clicking noise.
Then the car will run very rough until I restart it and
it's fine until I put a lot of load on it again. I do have
a CEL for secondary air injection but since that is
emissions based you would think it wouldnt affect
performance. Spark plugs and coils are new. Fresh
oil change. I havent checked specifically for
vacuum leaks but usually you would hear one if it
was substantial enough to cause performance
issues, and that doesnt account for the clicking
noise. What else should I check?