Moderators: IMOC Moderators, IMOC Committee Members
, exhaust and charge pipes. then put on msd ignition and went to go tuning with the safc 2 wen i pulled to 4000 its started going lean couldnt adjust enough fuel to correct it. the tuner suggests its either the apexi is not powerful enough to handle it or the fuel pump is going , now its starting to miss did anybody have problems with pumps or relays or anything of that sort with these?..(approx330 ish fwhp if you believe engine advantages dyno ), going to the fuel pressure regulator is very small , and on a spare rail which i have got is practically blocked with oily sludge which goes round the breather system , this could possibly cause the rising rate regulator not to respond correctly with boost , but your problems may just be down to a weak fuel pump or faulty fpr (250whp) rev1 injectors will be ok, which means changing the ems