[67ragtp]

My 427 sb FAST XFI EFI(4150 throttle body) set up stalls on cold start about 2-4 seconds after it fires up. It just falls right off and dies. If I catch the pedal with my foot it, and give it one little pump its fine and I can get out and let her warm up. Afterstart enrichment vs cts has already been increased from my original tune its around 45 to 52% @ 36 to 70deg. Any suggestions on what to try next?

Thanks Rich