The ever so common fuel pump whine

[mizagyu]

I know most pumps are audible.. well to those who know it lol. anyways i notice that when i take a sharp left turn the whining of the pump (this is a new pump by the way), will vanish. its still energized and pumping the proper pressure, it is just silenced. ive been watching for a month now, and it is the same result no matter the fuel level. so it is peculiar. is something broken inside the pump? it still supplies proper pressure and all, so it doesnt affect anything. just a curiosity thing.

[Careless]

how are you sure it's supplying the proper pressure when it whines. do you have a fuel pressure gauge that you're looking at while turning?

[mizagyu]

Careless wrote: how are you sure it's supplying the proper pressure when it whines. do you have a fuel pressure gauge that you're looking at while turning?

yes.

[Careless]

and this is a new pump!? interesting.

[jono794]

Sounds like it may not be secured properly in the tank, so when you take a left it touches something that makes it throw its voice. They can sing pretty loud if the pump body is touching something metal.

[Rick88ss]

The pump is on the right side of the tank so when you turn left the pump is submerged with more fuel. The extra fuel quiets it down.

[Z-31Turbo]

Ge-rotor and rollervane pumps creates a ''whining' sound from the factory.

Bosch and other companies started to design internal coating to reduce the noise of their pumps, but most company still only use precision grinding without any additional coating.

This mean, what pump the fuel is metal verus metal. The quality of the grinding & casting of pump influence a lot on the result.

Yes, it's a simple mechanical pump but it's not that easy at all to built one without any resulting noise.

Turbine pump are the less noisier and they are used in most of the application today.

I'd say that 80% of the pump on the market today are turbine pump.

They can have high flow & work pretty well under pressure but not as much as ge-rotor & rollervane or 2 stage pumps.

If the noise reduce only when you turn, then there might be two cause:

The pump is not well installed & vibration make the annoying noise

It's a wheel bearing on the left side of the car :lol:

[mizagyu]

Rick88ss wrote: The pump is on the right side of the tank so when you turn left the pump is submerged with more fuel. The extra fuel quiets it down.

still happens even when full tank. So its not just that.

[mizagyu]

jono794 wrote: Sounds like it may not be secured properly in the tank, so when you take a left it touches something that makes it throw its voice. They can sing pretty loud if the pump body is touching something metal.

i didnt know there was a wrong way to install a fuel pump lol. Seemed rather simple, as it directly bolts in on top of the rubber seal.. It sings just as much as the previous pump maybe a tad quieter. Just it shuts up during left turns.

[mizagyu]

Z-31Turbo wrote: Ge-rotor and rollervane pumps creates a ''whining' sound from the factory.

Bosch and other companies started to design internal coating to reduce the noise of their pumps, but most company still only use precision grinding without any additional coating.

This mean, what pump the fuel is metal verus metal. The quality of the grinding & casting of pump influence a lot on the result.

Yes, it's a simple mechanical pump but it's not that easy at all to built one without any resulting noise.

Turbine pump are the less noisier and they are used in most of the application today.

I'd say that 80% of the pump on the market today are turbine pump.

They can have high flow & work pretty well under pressure but not as much as ge-rotor & rollervane or 2 stage pumps.

If the noise reduce only when you turn, then there might be two cause:

The pump is not well installed & vibration make the annoying noise

It's a wheel bearing on the left side of the car :lol:

well thats nice to know about why they whine. Learning more every day lol. And the wheel bearings are A-okay. Just did them last month as maintenance. (no noise from them and nice smooth spin)

[mizagyu]

Careless wrote: and this is a new pump!? interesting.

i know, crazy right? Lol. Maybe il tears it apart and figure out how it works.