Still Fuel Pressure Issues!!!!
Weldman , if you have any restriction before the pump, nothing you do will help , you might want to verify that you have no restriction before the lift pump with a suction gage. fuel inlet restriction should be one of your first checks. no more than 6 in hg. at the lift pump inlet @ idle.
Weldman,your stock LP is dead,it is keeping the other pump from pushing the fuel,replace it and you'll be done messing around,the symptoms you describe are the EXACT same ones I have when the stock LP Quits.
When i cycle the key my stock Lp is running. And im still gettin about 16 PSI, the red holley i have on the line is only rated at 7PSI, were is the rest of the pressure coming from? If the stock LP is Dead.
Last edited by weldman05; Mar 8, 2007 at 01:08 PM. Reason: Forgot Something
So have every one of mine,hummed along just like they were doing something,but they were'nt.
unless you accidently blocked something installing the kit?
But I doubt that..I am certain that I'm correct.
If I'm not I'll take 10 lashes in the public square.
unless you accidently blocked something installing the kit?
But I doubt that..I am certain that I'm correct.
If I'm not I'll take 10 lashes in the public square.
Weldman, you may be getting enough fuel pressure when the resistance is high and the injection pump demands are low, once the injection pump demands an increase fuel flow, the flow will increase with it and the lift pump should be able to maintain that flow, now if you have some kind of restriction example in the fuel pick up in the tank or kinks in the fuel lines, you could be getting just enough flow in low demand and then not enough flow in high demand from the injection pump and you'll notice a low fuel pressure, best way to check that is to make a fitting you can install before the lift pump inlet and hook up a suction gauge that reads in inches of mercury "in hg." and drive it on the road with your foot into it and read what the restriction gauge reads. 6 in hg. at idle is max , I rather not see 6 in hg. under a load myself.
Yes, that is what a lot of guys do when they get the FASS. I have the system that includes filters so I just bypassed everything and ran my line to the injection pump. You will still want to run yours through the filter though since you don't have any filtration.
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Have you tried filling up the fuel tank to the edge of the filler neck open and then checked fuel pressure under an engine load?
BaldHog is right...Weldman05 you've got some big fuel demands with the Edge and sticks so at idle the demand is low pressure is high, when you stomp on it the demand goes up and the flow can't keep up so the pressure drops. Your 7psi Red would be a good pusher pump, but what you want is flow. For example, the black pump flows the most compared to the red or blue. If you run the Holley into the stock pump you will definately increase pressure, but you still may have flow issues. With the HP you are looking at, a bigline kit is a great idea.
To answer your question, A Holley blue will flow better than the stock pump so you could run just the Holley. When my Carter dies I may try a Holley Black to see if it keeps the flow up, I will also put in a bigline kit.
Good Luck!
To answer your question, A Holley blue will flow better than the stock pump so you could run just the Holley. When my Carter dies I may try a Holley Black to see if it keeps the flow up, I will also put in a bigline kit.
Good Luck!
I was also having fuel problems out of my holley blue when the factory pump died. I just bypassed everything from the tank to the filter with a 3/8 inch rubber fuel line from summit and streched the spring in my holley blue.
I am getting 18psi at idle, and 14psi at WOT. Not to mention my holley blue has already lasted longer than my last factory lift pump did.
I am getting 18psi at idle, and 14psi at WOT. Not to mention my holley blue has already lasted longer than my last factory lift pump did.
Weldman,
if you are still having pressure problems, bypass your pusher pump, drain your fuel filter canister, take out the the filter and then bump the starter. (make the fuel system stock again) If your fuel overflows the canister really quick, (like big mess really fast), your carter OEM pump is fine. If it is slow it has issues. When my carter pumps are good, I can bump the starter, pull the key out and the fuel is almost overflowing.
HTHs,
Joe
if you are still having pressure problems, bypass your pusher pump, drain your fuel filter canister, take out the the filter and then bump the starter. (make the fuel system stock again) If your fuel overflows the canister really quick, (like big mess really fast), your carter OEM pump is fine. If it is slow it has issues. When my carter pumps are good, I can bump the starter, pull the key out and the fuel is almost overflowing.
HTHs,
Joe



