High pitch humming sound
 

When I am driving my car I can hear a somewhat high pitch sound that seems to be coming from the passanger side of the car. I can't hear it when I get out of the car because its too loud haha. But when I blinker the pitch goes up and down with the light flashing. I think it has to do with the battery or the alternator, but those are both brand new. Any ideas?

Re: High pitch humming sound
 

My car does this too, but the noise comes from the rear, so that leads me to believe it's the fuel pump. I just got the car, and the guy I bought it from didn't know what kind of pump was in it, but it was overrunning the stock FPR, so I'm guessing it's a Walbro 255.

Re: High pitch humming sound
 

Yea I've got a walbro 255 as well. I could possibly be that, but why? I didn't hear anything from the engin bay but when I stuck my head inside the passanger window i heard it again.

Re: High pitch humming sound
 

It could be your fuel pump, it is getting warmer out so they will make more noise now.

~John

Re: High pitch humming sound
 

But why would my blinker cause the pitch to go slightly up and down.

Re: High pitch humming sound
 

It draws power from the electrical system causing a different pitch from the fuel pump.

Re: High pitch humming sound
 

Ya know I'm starting to remember reading something like this before. Glad to hear it's not something with the battery or alternator like I originally thought.

Re: High pitch humming sound
 

It's still ghey, I always wondered what that sound was because it only comes in warmer temps... now I know.

Re: High pitch humming sound
 

But you don't have an upgraded fuel pump, do you?

Re: High pitch humming sound
 

no, .. well not that I know of, but I get a buzzing/whine from the passenger side/kinda rear that lasts for a few secs when it's warm out.

Re: High pitch humming sound
 

There is a reason it is called a Whinebro!

Re: High pitch humming sound
 

I was just going to say that, newbs.

~John

Re: High pitch humming sound
 

Yea you can get a hardwire kit and the humming will go away. But to me its not worth it. I can work on my perfect pitch lol

Re: High pitch humming sound
 

No, the hardwire kit won't make it quiet. The pump itself is noisy. Mine is hardwired.