PM sent to PB Thanks for all suggestions, Just to recap, New Dizzy and cap,leads and plugs, timing done, compression on all cyl between 155 and 165 psi, new fuel regulator @36 psi, unmolested AFM fitted, all injector leads tested, all vacuum and fuel lines plus fuel filter replaced, cold start injector disconnected for the moment, new intake manifold gasket fitted (old one failed the wd40 spray test) From cold it turns over once, starts, and idles, and is still a bit rich, AND it still has a slight miss on one cylinder, so now i think its down to a bad injector or ECU.........I'm now bald, with a alcohol dependancy problem, but i still love my Datto.