Another fuel pressure question

[tgbol]

I just installed a fuel pressure gauge and now I am bothered by what I see. When I turn the key on pressure goes up to 10psi. At an idle I have 8psi. pressure never goes below 5. Now here is the kicker. Under a pull (unloaded) as soon as the boost gauge reaches 11psi the fuel pressure goes to 10psi and stays there until I back off. Is there a relay that sends a different voltage to the pump?

 

[Ron Bissett]

Originally posted by tgbol

I just installed a fuel pressure gauge and now I am bothered by what I see. When I turn the key on pressure goes up to 10psi. At an idle I have 8psi. pressure never goes below 5. Now here is the kicker. Under a pull (unloaded) as soon as the boost gauge reaches 11psi the fuel pressure goes to 10psi and stays there until I back off. Is there a relay that sends a different voltage to the pump?

Looks like you have a good pump seems normal , hope mine will do as good soon as I get it running . Ron in Louisville ky drive way

 

[Texas Diesel]

Mine runs 16PSI @ idle and 9 PSI WOT with a load.