Starts Fine and Stalls

[USArmyCombatMedic]

Cheap easy fixes are definitely the best! Unfortunately the problem is back. It start instantly for 5 or 6 tries than went quickly down hill after that. It now takes 10 sec of cranking to start and if I push pedal in 1/3 way it starts in about half the time. The only thing I did before it started working normally was A change the spark plugs, and B plug the dual tank lines. So my questions are, is it ignition problems because as soon as I put new plugs in it fired right up? Or, is it still probably my fuel pressure, I could make fuel line plugs a little tighter but not much, it might be possible that the extra PSI caused a burst line, but they are all new except for one? Or, is it completely unrelated and the fact that it started normal was a freak accident. Also, if I prime the pump several times, it seems to start a little faster as well.