I have a high pitched hum (maybe a whine) that seems to be coming fromthe floorboard beneath the seat on the rear driver side. It can be an intermittent hum/whine. Sometimes, if I am in motion without pressing the accelerator, it makes no sound, but when I press the accelerator it returns, but it does not adjust pitch with the speed of the car. You don't hear it so much from the outside of the car while it is running, but more so inside.It has just gotten cool in my area, if that has any bearing.

 

I haven't owned my Audi long enough to have really gotten inside it yet, but in my BMW that's where the fuel pump lives.

 

basic data required like age of car/engine size how many wheels does it have and have you been laid in the back seat lol ( fuel pump/filter )

 

The dealer indicated that the whine is a routine issue with certain years of A4's, sometimes related to cold weather. They offered to check it out, but advised there was little they could do but replace the fuel filter and/or pump, but wouldn't guarantee that it would stop the whine. They were hesitant to offer that, since I have no issue with acceleration, the cost involved, etc. So I left with no check out. It is annoying, though.

 

well the pump is on the passenger side rear right behind the seat. the left side is basically empty. and not all audis were made the same so some mroe info on the car would be good pls

 

It's a 2004 1.8T A4

 

fuel pump in tank so I doubt its that ( but it could be ) so for now im going fuel filter,










Removing and installing fuel filter - vehicles with 1.8 ltr. turbo engine with front-wheel drive (all versions) or with four-wheel drive to 10.04



Special tools and workshop equipment required



t
Drip tray









Removing



Observe safety precautions .



Observe rules for cleanliness .



–
Remove cover panel at right of fuel tank -arrows-.



–
Place drip tray below fuel filter.




WARNING[/align]


The fuel system is pressurised. Before opening the system place a clean cloth around the connection. Then dissipate pressure by carefully unfastening the connection.









–
Disconnect the following fuel lines on the fuel filter:



1-
Fuel return pipe going to fuel tank



2-
Fuel supply pipe from fuel tank



3-
Supply pipe going to engine



4-
Breather pipe



–
Remove bolt -5-.



–
Remove fuel filter.
Note[/align]


Illustration shows vehicle with four-wheel drive.









Installing



Installation is carried out in the reverse order; note the following:



l
Flow direction is marked by arrows



l
The marking -2- on bracket must align with the arrow -1- on the filter.









–
Fit fuel lines according to markings.









1 -
Return pipe
“RL�

2 -
Fuel supply pipe from fuel tank
“VL�

3 -
Supply pipe going to engine
“MOTOR�

4 -
Breather pipe
“E�





Note[/align]


Illustration shows vehicle with four-wheel drive.



Tightening torque









Component
Nm

Retaining clamp for fuel filter
1.2








[IMG]local://upfiles/12092/413C488407E541348629CAAADFA39FB6.jpg[/IMG]

[IMG]local://upfiles/12092/9F83997C0BDE4290876A5A6E490A2908.jpg[/IMG]

[IMG]local://upfiles/12092/5A4A0C82C6D14EA5BBE1B66CD0D822E2.jpg[/IMG]

 

Thanks, Dave. I am sure you are correct, as I just inspected it better and it is coming from the filter. I do not have the cover over my filter as in the attached diagram. Perhaps, that is the start of my problem! I will examine it this weekend when I can devote some time to the matter. I have no issues with acceleration or getting gas to the engine, so it just may need some noise dampening material around it.

 

its exactly that, new cars come standard with a thin neoprene padding and it wares quick and that's the point $$$$££££ ( why fit something that will last forever?