Re: 1994 351w efi swap EEC reflash?
You don't really reflash an EEC-IV, what you can do is add a Quarterhorse chip or equiv and either have a programmable chip, or if you choose, real time adjustability with a laptop.
You could just attempt to increase injector size and not tell the computer, but you are going to have a lot of tuning left on the table
For instance, when I do an EEC_IV program, I rewicker injector timing based on cam events, shut off a few emissions related switches, plot a new timing curve, then tweak injector slopes, MAF curves, etc based on what I see on the laptop logs. Necessary? no, but sure makes a difference if you really want to tune it.
70 Sportsroof, 427 FE/489 cid, TKO-600, 31 spline 4.10, A/C. modified Mass-flo EFI/reprogrammed A9L/CnC ported Victor.