I think had the same problem you had with cold starts. I used to have to hold the pedal down a little bit to get it to start quicker. I raised my IAC Multi setting by 10 and it solved it. My AF Ratio is 14.2 at idle and I'm at about 13.7 when I am on it at 1/2 pedal and 5800 RPM (cant go full pedal as it breaks the tires loose, I need drag radials).
