I was gettin insane white smoke too. I didn't have Eman-Ultimate, but the IntX and was still having this issue. Mine would stall at idle though. My mufflers were clogged from the previously very rich tune with the E-manage as well as my midpipe! It ran fine when all we had was just an open downpipe. If u can, try cranking it with just ur downpipe and see how it idles.