High pitched "hum" after engine shutdown

[barefoot1999]

Has anyone else experienced a slight high pitched "hum" for about 30 seconds to a minute coming from under the hood after the engine is shutdown? Fuel pump maybe?

 

[DBLXX]

Yep, I do. Dint know what it is - but it's very noticeable when I get out of the car quickly.

 

[Hank3]

Same thing with other Mazdas as well... and it's the fuel pump.

 

[m8te]

I have that sound too. I thought it was battery. I take it this is normal then? I didn't think it was an issue to follow up since it goes away after a few minutes.

 

[Bcdad182]

It's just the flux capacitor cooling down.. don't worry about it. (crazy)

 

[barefoot1999]

It's just the flux capacitor cooling down.. don't worry about it. (crazy)

I KNEW that was it! Thanks

 

[Hank3]

I take it this is normal then?

Yes.

 

[CX-5um]

It's just the flux capacitor cooling down.. don't worry about it. (crazy)

Yeah don't forget to top off with a banana peel.