I just picked up a beautiful 07 silver 350z touring. I love the car! When i accelerate, i hear a what sounds like hissing coming from the engine area behind where the steering wheel is. Is this normal, any ideas what causes that? It doesn't really bother me but I don't know if it is normal.

 

intake sucking in air most likely.

 

do you have a aftermarket intake? is so its normal.

 

Aftermarket CAI's or even,K&N drop ins will cause this.
Normal...
Also,does the car have stock exhaust components?
Many "test pipes" produce a hiss.

 

Both Z's IVE been in with aftermarket filters along with mine have NEVER notice the hissing sound on accelaration.

Only heard in exhaust set ups on deceleration.

 

Everything is stock.

 

its the chupacarba bro.. sorry.

kill it with fire.

 

Just drove it around and noticed it only happens during hard acceleration. Must be air rushing into air filter? It's on the driver's side which is where the filter is.

 

I'm pretty certain the 07 was a revup motor, two intakes?

 

Moved to the correct subforum

OP, when did this start happening?

 

07 has a high-rev engine not revup.

but yes op, your car has two intakes. one on each side!

 

Check under the intake tubes, there are rubber tubes running into the valve cover. Sometimes people dont put the connection at the intake tube correctly and they fall off.

 

You have TWO intakes (and filters)..right?

 

The whooshing (or hissing) sound is similar to that in this video when they hit the gas hard:

I'm guessing its normal?