Strange noise
Thread Starter
Instructor
Joined: Sep 2008
Posts: 233
Likes: 17
From: Macon GA
Strange noise
Went on a road trip this past week and when I stopped for gas I noticed a strange noise coming from behind the driver's seat (I think).
Noise sounds like the high pitched while a small electric motor makes. It sounds almost exactly like the bilge pump in my boat. Once I filled the tank I didn’t notice the noise as obviously.
The sound changes pitch when I tap the brakes or turn on any electrical device. It even fluctuates in pitch when the blinkers are on but only makes the noise when the motor is running.
Any ideas on what it could be and how to fix?
2000 A4 Coupe w/no mods.
Noise sounds like the high pitched while a small electric motor makes. It sounds almost exactly like the bilge pump in my boat. Once I filled the tank I didn’t notice the noise as obviously.
The sound changes pitch when I tap the brakes or turn on any electrical device. It even fluctuates in pitch when the blinkers are on but only makes the noise when the motor is running.
Any ideas on what it could be and how to fix?
2000 A4 Coupe w/no mods.
Tech Contributor
Joined: Dec 2006
Posts: 10,962
Likes: 29
From: Van Buren Arkansas
Wounded Warrior Escort '11
Its the fuel pump. As they age, the sound changes, but unless you have a loss of fuel pressure, I wouldn't worry about it. To be sure, put a fuel pressure guage on the fuel rail and measure it.
