Hello

Does anyone know of a solution to this problem? I see it mentioned often but never any resolutions in the forums.

I have this drohning / humming/ buzzing noise from behind the right seat when the pump runs for 2sec and when the engine runs. It is seriously annoying and I will have to sell this car if I cannot solve it.

The noise is also strong from the tank filler. I open that and listen there, I can hear it loudly from there.


It is fuel pump noise for sure and it transmits itself into the tank which then spreads and amplifies it throughout the rear wall of the passenger cabin.


1) I changed the filter.
2) I changed all the hoses going from the pump to the filter to the coal cannister etc.
3) I ran the pump with it's whole cradle removed and hanging loose under the car. No change.

I have NOT changed the hose from the tank to the pump. It looks good but is not super-soft.

I now changed the fuel pump itself as well.

And it is much worse! This pump is even louder.


Any suggestions will be greatly appreciated as I do not know what to try next and I am sure this car did not leave the factory like that.

Regards
Bernt