here is the deal i just put the vulcan relocator and big line kit on and it awsome have 14 at idle and no less than 12 with the edge comp on at wot but 2 times now when i crank the truck pressure is good then falls to about 4-6 and stays. I can cut it off and back on and run no problem. Its like its sucking air or something. Any ideas. only happend 2 in 2 weeks.

 

Pressure drops as resistance drops. Seems to be normal with the big flow kit to have pretty low psi *at times* for awhile.

Id say keep driving and just make a note of when it does it.. Eventually goes away from what ive read. I dont have the kit myself tho. Looked into getting it and decided to leave er stock.

Im assuming you went through the whole bleeding of fuel system etc etc??