Low Fuel Pressure at wot ?

[KINGCOBRA86]

Been having this issue for a while ! it's a great kit but scratching my head ?

Div x 2000hp kit triple 465 pumps id1300

With 24 psi I see 48psi at wot off the frps sensor car has plenty of fuel left in the transfer function I ha have af at 11.00 at wot,

I hook up my co2 bottle from my boost controller to my regulator and hit it with 30 psi (key on ) it hit past 70 psi and stays there no dropping ?

My data log shows battery 12.60 volts at wot ?

I put new pumps new clamps intake etc new fuel filter ?

 

[decipha]

are you doing that and making a WOT pull or just checking it at idle?

an idle test is useless since you won't have the fuel flow where the issue lies

 

[04sleeper]

You are not taking into account that FRPS's measure DeltaP, not actual fuel pressure. You need to add your DeltaP of 48 + boost of 24 = 72 psi. Sounds just about right to me.

Remember, your fuel pressure regulator adds 1 psi for every 1 lb of boost. If it didn't, for every 1 lb of boost, you would loose 1 psi of fuel pressure because the intake is pressurized against what the injector is trying to put out.

Hope this helps explain it.

 

[KINGCOBRA86]

Awesome thanks ! Kevin
It was a faulty alt this hole time data shows it 10.50 at wot I also put a new one on and it shows 11.80 at wot ?