I have a 2002 honda accord 4 door, with the 4 cyl., I have a buzz coming from under the car every 60 seconds when the car is off. This can't be normal, I am wondering if maybe the fuel pump is kicking on trying to maintain fuel pressure. Why is it doing this when the car is off? Any advice would be appreciated.

 

Have someone turn the key ON (but not START) to hear the fuel pump sound.

Underneath the left-rear seat? I bet its the EVAP canister releasing tank pressure occasionally.

 

It is coming from under the left rear seat, I will check tonight, If the fuel pump makes a different noise then maybe I need a new gas cap?

 

Good analogy there Jim, how you been?

 

Heh heh... Angelo, I wasnt even thinking about that kind of analogy!

Not the gas cap which is supposed to be sealed.
EVAP system is supposed to vent gas tank but its not continuous.
The little release valve is supposed to be pretty quiet, but you are not the first one who has a louder one.

Pinpoint the location of the sound would be a big help.

 

its about a 5 second hum. I will investigate further....