Ok i have been searching for a while and maybe its just that i am looking in the wrong place. I just bought a 91 yj with a 4.7 stroker in it. Right now it has yellow top injectors. But being somewhat a car guy i know it should have bigger injectors. But i need to know what i need to do to run bigger injectors. I know with mustangs you need to change mass air flow sensor. But what do i have to do with my 91?