I'm reading codes 14, 21 & 42. The 21 is explainable since the o2 isn't hooked up yet. The 14 IGF signal from igniter is not input to ECM for 6 consecutive ignitions & 42 SPD signal is not input to the ECM for at least 8 seconds during high load driving with engine speed between 2,750 rpm and 4,000 rpm are the ones that I can't explain!! Help needed can not make heads or tails from this FSM. Need something a shadetree mechanic can understand. As you can tell these computers aren't my cup of tea!! Open for suggestions that I can understand. All connection are in place as best I can see. Will get under there and hand check each one for good clean connection!! Thank you!!