Replaced O-Rings on HPOP now it wont start
 

So I took my HPOP out put a new o-ring's on it and the IPR re-installed it, now no start. Its throwing code P1212 and P1280. When it is cranking over the oil pressure gauge will be low then jump up to normal. Please help:argh:

how much have you tried to start it? when you do anything with the oil system it take take a long time to start it again.

joebob- i cranked it until the batteries went dead yesterday, i plugged it in last night thinkning a hot engine would make it start easier, i put brand new fresh batteries in and i just cranked it for about 15 seconds 2 separate time. its cranking at 200rpm, the oil psi guage starts low then jumps to normal after about 5 seconds of cranking.

oh and it quit throwing codes

i also unplugged the ICP to fool the system and that still didn't work

I have drained my batteries a couple times to get it started. Some pickups start easier then others after doing something like this

Is there anyway if telling if there is forsure air in the lines?