Just to start off the vehicle that I'm talking about is not the truck in my signature.
My bosses truck is an 01. He just had a new VP and lift pump put in about 5000 miles ago. I installed the edge juice w/ attitude on his truck and the fuel pressure at idle stays in between 10-12. Under load when pulling 18k his fuel pressure drops to 6psi. I knew that was too low for it to be dropping(or am i wrong) so I called the place that put in his new fuel system and the guy told me that they relocated the pump back by the gas tank to reduce vibration and heat . Would that be a cause for seeing his fuel pressure so low or should I tell my boss to take his truck in before he has to buy another.
ANY and ALL suggestions would be great, esp. if he has to replace anything.(what to buy, where to buy...ect.)
Thanks

 

Those are the same pressures i have now after I installed new LP.. I think that pressure is just all the stock type LP's can produce...

 

I just installed an edge juice as well. Mine shows about 12 @ idle, about 8-9 @70mph, and down to 3 @ 3/4 throttle when i have the setting on anything other than stock. A fass is my next purchase. I think our stock LP's are just too weak to handle the demands of a VP when a program is in effect.

 

my stock LP has never seen below 7 with the juice on 5x5 on WOT...i'm usually at 12-13 @ idle

 

A big line kit can help the pressure from dropping so drastically. With an oem pump and a line kit from vulcan performance and I couldn't drop pressures below 12 psi, even in the high 400 hp range.