After I put in my 60# FI my fuel trims have been -5 (idle) to -20 (acceleration). I was under the impression I should MAF to get those under control. It's just dumping fuel. My milage with about the same driving habits has dropped from 22-23 to 16-17mpg. Seems steep to me.

I'm also having spots where my timing will go -5* (negative five, not minus five or five less than) at part throttle when boost hits at 3600-4000 rpm. What do I do with that, do I fix fueling first or attack both?