Mate gap your plugs first of all try .75 , get your car on a dyno and check you air/fuel ratio asap, you would want it around the 12's to 1 area, If you continue having problems im sure if you email or call a reputable tuner here in OZ they can steer you in the right direction, all the tuners on this site have obtained awesome results with these engines over the last 5-6 years, these guys can organize a mail order type tune with the flash tune device ( not sure what you have over there) you mention CAPA , who used too distribute the ford flash tuner . what do you have there ?????? U mail the box which holds 3 tunes and the tunes will be loaded into it, provided you give a accurate list of mods injector type, exhuast , ect, ect, just keep away from a tuner located in castle hill sydney you might end up with a grenade, CV performane in taren point sydney is the way I would go, or you might even ask your tuner to talk to them direct ! in the mean time look around the site there is heaps of info on here ! good luck Pete