High pitched hum

[BryanS]

Hey everybody! It seems like my 2004 IRL makes a crazy high pitched hum after I start it when it's been sitting for a while. It goes away and it's not that big of a deal I hope. I was just wondering if anyone may know what in the world it is. Thanks in advance!

[TheWastedYears]

When my car's cold, the exhaust resonates throughout the car at a particular RPM. I guess you could describe that as a "hum." You can feel the resonation through the body panels and e-brake.

If that's what your car is doing, then it's a normal by-product of the exhaust note.

[socalsilverRL]

did you leave your girl's vibrator in the back seat? lol...my car vibrates all over,, then again I ahve the bwoody mounts. where is the vibration coming from? I know where these cars rattles are now, with the new mounts.

[NoRemorse]

Originally Posted by BryanS

Hey everybody! It seems like my 2004 IRL makes a crazy high pitched hum after I start it when it's been sitting for a while. It goes away and it's not that big of a deal I hope. I was just wondering if anyone may know what in the world it is. Thanks in advance!

DOn't know how sensitive your ears are, but when I had my rear seats removed, I could hear the fuel pump like crazy! I guess it could be described as a high pitched hum.

[Watts-Up]

Originally Posted by NoRemorse

DOn't know how sensitive your ears are, but when I had my rear seats removed, I could hear the fuel pump like crazy! I guess it could be described as a high pitched hum.

That's what I was thinking, fuel pump.

[BryanS]

I think the exhaust resonating sounds like what I've got. It's only when it's cold and it souds like it's coming from the e-brake. Thanks a lot guys.