PLEASE HELP!!! LS swap 5.3/4l80e/bw4401 4x4. NO START ISSUE!!! built the harness via instructions from lt1swap.com, pcm is hptuners with vats, egr, secondary o2's programmed out. new install, does crank over, fuel pump is pressuring up for 2 seconds then off, checked crank sensor, have voltage...