[benmarkle99]

hey, i just got a1990 240sx and when ever you accelerate when driving it makes this kind of hissing sound. It only does it when your driving and not when your parked. And it only happens when gas is given. just wondering what it could be im thinking a pin hole in the exhaust or something.
thanks

 

[Jjaeger240]

How long have you had the car?
What's done to the car?
Where's the sound coming from? etc etc.

 

[mikethebiker]

hissing sounds like an exhaust leak to me. also, if your in a gear the engine can't rev like it can when you are in neutral, like 20mph in 3rd, and things like that where the rpms are real low you wont be in the powerband and it makes a "hissing" sound just from air turbulence. Check your exhaust, but otherwise get used to it

 

[orange_silvia]

Sounds like maybe the intake, i know if the throttle body is partially open and the vehicle is under a load it makes a hissing sound.

 

[poserpro]

iono but the hissing sound i have sounds cool to me

 

[S13ontap]

you could pass it off as a turbo spooling up...



...wow, my first post in a month and its useless

 

[millworkman]

Check to make sure there are no cracks in your intake plumbing and vacuum lines.

 

[ChuKi RB]

See where its coming from and get back to us. It could be anything. Loose hose, exhaust leak, bad intake gasket, etc.

 

[kbeperformance]

sounds like an intake/vacuum leak try some soapy solution for finding leaking in plumbing. If it idles fine and accelerates fine then it's not really a biggie.

 

[benflagg]

Check to make sure there are no cracks in your intake plumbing and vacuum lines.

sounds like an intake/vacuum leak try some soapy solution for finding leaking in plumbing. If it idles fine and accelerates fine then it's not really a biggie.

+1 It also sounds like a vacume leak to me. How well does your car Idle?

 

[mondojackal]

+1 It also sounds like a vacume leak to me. How well does your car Idle?

mine does it too, especially when it's in a lower gear than it should be and i give it some gas. i dig that sound. you can hear it more now that i've got an intake :dancingco

 

[ChuKi RB]

:rotflmao