Ok, so here it goes. I put a 4.6 modular v8 together and put it in a 2002 ford mustang GT Jack Roush stage 2 five speed manual. It will not start... I have checked the voltage on the throttle position sensor. .986 when closed then 4.66 at WOT. It has a new fuel pump, a new MAF, it has a new Fuel pressure sensor. I have flow tested the injectors as well as pulse test and everything was fine. The ignition coils are brand new MSD coils, and they are sparking fine. When I turn the key to the on position the fuel pump comes on to build up pressure like it is supposed to, all the relays click. (I've tested ALL of them) all the fuses have power. I'm running out of ideas as to what to check. I know the PCM sends the ground signal to the injectors for it to pulse. I just don't understand why its not happening, any help would be greatly appreciated. Thank you.