wrong fuel, aggressive timing, Scott's the man on these ecu's. if he suggested not to run it, Pal i wouldn't.
this is what you want to buy. Scott's own ecu
http://www.ebay.co.uk/itm/subaru-imp...item3f29175eee
or £525 for esl maped by jgm
or 2nd hand Apexi power fc of ebay £200-300 atm and £250 for jgm to mapp it.
id put the prova on ebay, get what you can, put few quid together and get one of the above