I need a bit of clearing up about this kind of thing. Some early fuel injected cars can't be chipped, like the 3S-GE and 4A-GE. At least that's what I've read - I think Powerchip won't change them either (I think they do a piggy-back ECU kind of thing). But can you actually replace the entire ECU on those engines, say, with an Autronic or a Motec?