I have just rebuild 13brew whit primary 850 and secondary 1680 injectors, power fc, walbro 255 fuel pump, aeromotive fuel press regulator whit stock fuel pressure 27psi. First star whitout stock map senson it idle and works fine rich 11 afr. When i put map sensor on it begins to adjust the ignition and work good only to press gas or by keeping gas it not work anymore relase gas to idle then engine stopped. Power fc pim settings is 1. normal and injector pr is 64,5% +0,04 sec 53,0% +0,10...?? https://www.nopistons.com/forums/pub...IR#>/wacko.gif