Hey guys,
I just got my 350z today, and I love it.
It's a 2004 base with 63k. 6 speed of course.
I do have a question tho.

When I drove the car, and when I picked it up today, it was low on gas.
I filled the tank and now there is a hissing sound that sounds like it's coming
from behind the seats. It's only there when the car is started. Does anyone know what this is? it's constantly there and you cant hear it from outside the car.

I tried to do some searching, but I'm new to the whole forum thing, so I didn't come up with too much, except maybe something related to the fuel pump?

Anyway, I'm really happy with the car.
And I'll be on here searching around trying to learn everything I can about these cars.

 

Replace the gas cap. 20$ max from Pep Boys or Auto Zone. No guaranteeing it, but its worth a shot.

OR

Does it get louder with RPM increase? Could be an exhaust leak.

 

Try this. When you get in to start the car, turn the key to "On". Do you hear that same sound momentarily? Or at least hear it from the same area?
If so, it's just the fuel pump. Turn up the radio.

 

Welcome! Hope some of these answers can help you.

 

Yeah, I can hear the pump like priming up when I put it in the on position.
So that's normal?
Thanks everyone