Going to be working on a well built $0D MPFI conversion this week. Did the tune last year and no issues, except cold start is still to rich. I've read about others with same issue after a MPFI $0D swap but never heard of the cure?

I remember trying a few things back then but it was a one shot a day thing and guess I never got the cold start dialed in...

Just looking for ideas before I get my hands on it again?