quick question for my buddies.... Installed an FMF Powercore and s/s header. Was running 170 m, 48 pj and 1 3/4 turns out on f/m all ran fine with stock exhaust. Put new set on and can't seem to get rid of the decel popping. Have moved needle setting up and down one clip no difference. Also tried running the JD red needle on 4 from the top no real change, even when I'm at 2 3/4 on the f/m. Tuning location Socal, I've read most of those jetting sites, too many combos. Should I buy the Boyesen fuel excel ??