"Well, it's been a few years since I've messed around with a TwEECer, and I never really had to do much with the idle on my 94, so I don't think I can be of much help. The EEC tuning forum on corral.net would be a good place to ask questions for him, though. It should be pretty straight foward, that's not a very radical setup. BTW, the low end resolution of that ProM sucks, with a TwEECer he should just get a 90mm Lightning MAF (just requires the MAF harness from a 4.6L Mustang) and plug in the transfer function for that specific meter into his tune, that will improve driveability a ton. Also will make it easier if he gets larger injectors; just change the injector setting in the tune to 24 or 30 or whatever instead of the hack "calibrating" a ProM or other aftermarket MAF would do. Speaking of, I'm surprised that kit doesn't include bigger injectors; is he still running factory 19's? Those would be pretty maxed out on a setup like that. Just got up a few minutes ago, still a little fuzzy if this doesn't come across as coherent..."