QUESTION: How do you re-profram an ECU?

ANSWER: Few different things most people keep it a secret...
but a burner (reader/writer 28pin (27C256 in particular) eproms for 85-95 hondas/mazdas/pontiacs/mustangs)

then a good program which usually comes with the burner...

programs from other ecu programers or copy of chips from mugen or spoon oem ecus...or improving the factory program...(i sell just the programs if interested) whole CD of different non-obd obdi mazda mitsubishi you can expand to ford gm and many others....

other then that the rest is a secret....but can be sold at right $$$ so you can start your own business


just a little info for you all.