Hey everyone. I just started to notice a "hissing" noise from under my coupe. It is intermittent. "hiss-hiss" then a second or two of nothing, then "hiss hiss". It keeps doing that. Sometimes it isn't there. Anyone else have this issue?

 

Yes...I have the same problem when I accelerate...Someone please tell me what it is so I can take it to the dealer and tell them!

 

I have that same problem... I really noticed it when I installed my test pipes...

 

I have not looked yet but does the G35 have a smog pump or air circulation system on the cat? If it does that might be it. Or it could be the fuel pump.

 

Its the FUEL PUMP! I started hearing it to one day and took it to the dealer. Let me just say i left feeling a little stupid!! heh theres nothing to worry about it's completely normal!!

 

hmm, really? thanks for the help... i feel alot better now.

 

Absolutely normal guys. Iv'e heard it on my previous new cars as well. Your just paying attention to detail because of the "newness" of the car I can't blame ya...

 

thanks GIF, you second the fuel pump notion?

 

I am not mechanically inclined to say so, however, from the previous cars I have bought (Brand New), I could hear it most when driving home after traffic or so and just standing idle in my driveway.

 

hmm, okay... thanks. this is not my first new car either, and this is the first time i have ever this noise.

 

Hummm....I hear that in the summer time when the AC condensation drips on the exhaust......
You sure you don't have a leak in something????

 

i have no clue. you know what it sounds like... when you turn the steering wheel all the way to its end left or right... and it makes that noise. very similar sound.

 

If it's under the front of the car, it could be condensed water from the a/c dripping on the hot exhaust.

If it's under the rear, it could be the fuel pump altho that's more like a whine than a hiss.

C.

 

it sounds like its from right under the front seats.

 

ITS THE FUEL PUMP DUDE!! Its hard to describe, hiss, whine, either way its normal nothings wrong with your car.