My FP with the stock LP was running about 10 psi at idle and dropping near 0 psi at WOT. So I bought the Vulcan Kit and installed a Holley Blue on the frame in front of the tank. Now my FP is 6 to 7 psi at idle and 0 psi at WOT. I thought maybe there was a restriction in the tank line so I blew back through the line with 90 psi to make sure it was clear but there was no change. The only solutions I can come up with are the pump is sucking air or the pump is bad. I only used the rubber hose from the Holley to the filter housing and I didn't install the regulator. Thanks for the help.

 

Fuel filter......?
Collapsed line between tank and Holly.....?

 

Sounds like a REALLY clogged filter or a pinch in the line somewhere not allowing it to flow right. With the Vulcan kit and the Holley blue you should be in the teens on fuel pressure!!

 

Is the Blue pump used or new?

 

I changed the filter but only saw about 1 psi gain. The pump is new. Thanks.

 

I moved my FP guage to the incoming side of the fuel filter instead of the out going. With it there I see 11psi at idle and 8psi at WOT. I think I've got a problem with the Prime-Loc. I've been thinking about getting rid of it since I got the truck maybe it's time.Thanks.

 

Do your self a favour,install mopars updated lift pump module assy.If you are over 400hp you may need an additional lift pump installed in the stock location.The P/N is 05175538AA its one of the options available to open up the fuel module.

 

Thanks for the help guys. Anybody know were I can find a used Fuel Filter Cannister for a 99' reasonably priced?