cefiroguy

chipped ECU, Turbonetics T3/4e, W/gate , walhbro 500 Fuel pump, 3in Exhaust, bov, FMIC, it was running Iridium plugs so i changed to factory plugs and still no change. so im a bit stuck on ideas. its more like its surging

have got an RB25DET S2 motor in a cefiro and about a month ago started to miss so presumed it was coils, did a wasted spark kit on it and changed afm still no change. it will get boost if i slowly put gas down but wont when fully down? it stutters and looses boost. if any one has any ideas it would be much appreciated! cheers