Announcement

Collapse
No announcement yet.

Fuel Pump Buzz

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Fuel Pump Buzz

    At start, the fuel pump hizz normally but once the accelerator is blipped, pump buzzes. I find this abnormal because my Z3 pump is quiet.

    Does this mean my M3 fuel pump is shot? I have adjustable FPR and no matter how I tighten the screw, pressure wont go up past 20 psi at idle. If revved, reading is up to 43 psi. What could be the problem, fuel sender of fuel pump. Does low-low fuel level in tank affect the fuel output pressure from the pump?

    Appreciate your help.

    audibm

  • #2
    Or fuel filteris clogged?

    audibm

    Comment


    • #3
      Could be the in-tank pump is broken, so the external pump is working so hard it makes more noise (or vice-versa)
      The Euro models have 2 pumps, but I think US models have quite a different fuel system (I don't think they have the second tank in the boot?)
      Steve
      Scottish Cecotto

      Comment


      • #4
        You could be right Steve because the external pump sounds like there is cavitation. It gets starve with fuel. Anyway, I will find it out this weekend.

        audibm

        Comment

        Working...
        X