Loss of fuel pressure under wot??????

[82 wild bill]

i have a 2001 ford 7.3L with a ts chip on it loaded with tonywild man tunes. I am loosing fuel pressure under wot on the extreme tune(down to 15lbs) is this a sign of a weak fuel pump or could it be in my return spring? i have a 70lb spring in my truck.

[82 wild bill]

bump:

[7.3coal roller]

fuel pressure is usually going to drop a little under WOT, but should not go below 45 PSI. Unless your pouring *** loads of fuel into it theres an issue with the pump or filters that are clogged preventing flow.

[1badkawie]

Did you figure anything out? My 95 is doing the same thing.