[SkinnyG]

I've done Megasquirt on a few vehicles, but nothing with FiTech. I have also hacked an older GM TBI computer with good success (re-programmed a stock 5.0L computer to feed a cam/header/big-bore-tbi/higher-fuel-pressure 350).

In Megasquirt (and I'm sure others), all your tables are based off AFR numbers you pull out of your butt, which could work if your engine actually likes 14.7:1 for cruise. Or, if your W/B-O2 is even reading correctly.

If you can tune a carb, you can probably tune EFI, but it really depends on what the ECU lets you mess with and/or how user-friendly it is.

Cold start is the hardest to tune, because you only get one shot each day.

But - I have heard lots of negative about FiTech.

Would you be willing to PM me your various tables and settings? I have no experience with FiTech, but I might be some help. Maybe. Free, anyway.