Just installed power logger and my map sensor is reading 27psi with key on engine off? I replaced with another map sensor getting same reading? Not only that the car pops and backfires and won’t start. Has new fuel system just installed, injector harness, turbo, Down pipe, maf, I have a accufab adjustable fuel regulator seems like it dosent hold pressure either? Took fuel rail and injectors out of intake and checked for leaking injector, no leaking injector. Any ideas? I have a crank sensor and cam sensor ima install today.