I notice at night when I get home from work when im cooling down the car, I hear a high pitch sound inside the cabin. Like its inside my head. But once I turn it off it goes away. Turn the ignition to ON( I dont crank the car on) it comes back. What can it be? I looked around but I couldnt find the source of the sound. My mods are exhaust, hyperground & ignition, AEM analog boost, and digital A/F.

Thanks

 

Probably the fuel pump.

 

I will second that, I can hear mine if its quiet out and nothing else is on.

 

I only hear it good at night when its quiet.

 

Remove your backseats and put your ear close to the fuel tank/pump assembly. If that's where the noise is then it's your fuel pump. Nothing to worry about. In fact, if you get the Walbro 255, it's going to get a little louder.

Just remember Evos are far from luxury (besides the seats), so get use to annoying rattles and noises.

 

probably walbro whine

 

Transercase!!! Lol. Just kidding

 

Your girlfriend in the trunk maybe...

Probably your fuel pump but try to move around the cabin to see if its coming from the back or the front. You could also be getting an electrical whine from your radio... is it the stock radio?

 

Fuel pump!

 

Next time wrap your head in aluminum foil and listen if you could hear it.


I'll go with the fuel pump too.

 

Don't scare me like that. Just kidding.

Ill check under the backseat for the sound.