I cracked the head on my m42 so i decided to do a engine swap, and i cant get the first start for the life of me. I've been trying to diagnose my no start for literally over 30 hours now, I'm very stumped at this point. I have a 1991 e30 with a m50 from a 1995 325i. I have spark and crank but no injector fire. Fuel is at the rail, Crank sensor tested good, tach doesn't move while cranking, car sputers with starting fluid, red and white wire has power on injector harness, ecu has power, tried multiple red label non ews ecus, checked and replaced questionable grounds, inline fuse was replaced and is good, harness adaptor was ordered pre made but i checked it to make sure its right, main relay clicks and activates fuel pump relay. I'm out of ideas. PLEASE any help is appreciated