Ok I put a b18a1 in my dx crx. I have already did the mpfi swap and now it won't start unless one of the white wires is unhooked. If they both are hooked up it will start for maybe a second. But it will start and run with it unhooked. The codes with it unhooked are 4 and 15. Ps I have tryed different ecu and dizzy. Any help please.

 

double check your grounds.

 

I have three grounds. Any other ideas