What's this sound from the alternator area?

[speedster]

[QUOTE=sapote;n95831]

Meant to write "causing" but the autocorrect changed it to "casing". How did you clean the MAF? Hope it wasn't damaged during cleaning. Also check the pins if any got bent during installation. A bad connection causing the DME to run in opened-loop and rich fuel.

Haha makes sense! I cleaned it using a MAF cleaner (sprayed on liberally and let air dry for an hour). I'll re-check the pins but I have a feeling it likely got damaged during cleaning as upon re-cleaning the code changed from running rich to running lean.