Fuel Injector no spray

I should start at the beginning, I blew out a oil sensor 3 months ago but the lackys I had working on it said it was an oil pan gasket. So after the oilpan gasket and oil sensor were replaced it refused to start, no fuel to the rail, replaced the fuel pump and filter. Fuel to the rail injector not spraying, replaced the injector still nothing checked the harness 11.2 volts to the red wire nothing on the blue (dont know if there is supposed to be voltage on both sides) replaced the replacement injector still nothing. The car cranks fine starts and runs (loosened the injector strap and fuel pooled over the old injector into the TBI and ran till I shut it off), what other avenues am I missing is there a injector fuse? Is it a computer issue?