Recent content by Renncredible

  1. R

    454 low fuel pressure

    Ok yep, makes sense. Tested with engine running and have 13.5 volts at the pump. Back to the drawing board.
  2. R

    454 low fuel pressure

    Today I got the multimeter and tested the pump. I have minimal electrical knowledge so bear with me. Key on at the pump meter says 5 volts. I have one lead on the ground and those 5 volts from one of the leads on the harness. Cleaned the ground no change. Follow it back to a connector under the...
  3. R

    454 low fuel pressure

    I have no way of knowing if this gauge is accurate. And I never tested my pressure when the truck was running great which was right up until after I hauled a car halfway across the country last august. It was then I started getting lean codes and it does this bucking thing when Im in overdrive...
  4. R

    454 low fuel pressure

    Im sure my pressure would keep climbing but Im testing it by myself and have to go from under the truck to check the pressure and back under to release it. It was at 75 and climbing I didnt want it to go too high. Also not sure it was completely pinched. I installed a GM pump in it a few weeks...
  5. R

    454 low fuel pressure

    I installed the fp10021 yesterday and tested the pressure again. First key on its 52, each consecutive prime it drops 1 psi each time. Engine on its 48-47. When I throttle it up the pressure jumps up a few psi for a split second then drops to about 45
  6. R

    454 low fuel pressure

    I got a new delphi fp10021 fuel regulator installed yesterday. Pinched the line this morning and it rose to 75 then I released it.
  7. R

    454 low fuel pressure

    When I pinch it off what should I be looking for?
  8. R

    454 low fuel pressure

    The O2 sensors appear to be working properly. Brand new EGR as of a few months ago. New knock sensors are on the way not sure the current ones statuses. I have a super basic scan tool that shows an engine timing advance of 25 at idle, drops a few points when accelerating and dances between 27-33...
  9. R

    454 low fuel pressure

    I havent done that before Im not sure that my return line is rubber or anything that can be pinched. I just put in a new FPR last week
  10. R

    454 low fuel pressure

    I have a 1999 7.4 vortec with both banks throwing lean codes. Bank 1 is just slightly above 10% sometimes but bank 2 is consistently 25%. Vacuum tested good @18. New fuel pump, filter, regulator and injectors. Fuel system harness was replaced in ‘21 and I’m still getting less pressure than I’d...
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