I bought a fully deleted 08 6.7 with g56 2 months ago from a dealer, I was told it had a single 40 horse tune from efi live, truck rand fine up until last week the fuel pump got weak, I replaced it with a stock pump. Ran fine for 3 days and it messed up again, I'm gonna have a fass fuel system put in but I got in it this morning and it was 40 degrees, truck stared fine but I had a light on the dash on, I cycled the codes and it had 8!!!

P144e
P245c
P2141
P0405
P0487
P1011
P000f
P0087

I have looked at these 2 are for low fuel pressure, the rest are egr related, anybody tell me why it's doing this with it being deleted? It has never done it til this morning