No Sound Of Sucking Air From Air Filter

[nismoskyline32]

hi there,

my mushroom(air filter) has no sound of sucking air and the sound of when u release the pedal(duno how to explain). totally like a stock air box.

and just a little sound when rev it up to 5000rpm

it happen suddensly>.<

thx for help

[rgr34]

thats unusual... is it securely fitted.....dirty maybe?

[mad082]

i had a k&n pod filter that was like that. it was the one that is the opposite shape to most pods. you could still hear the stock bov on gear changes, but no induction noise.

[SilverECR33]

eh mine dont make noise either,, k&N pod.. bad sign?

[mad082]

another mate of mine had one of the k&n's on his 33. then he changed to a different 1 and it started making the sound.

[nismoskyline32]

mine is apexi filter

and same as my friend in his STI

he does make sound but mine not

[LatinR33]

Apexi pods are loud so no idea why you cant hear anything. Have you lost boost pressure?? can you hear the turbo spooling??

[MANWHORE]

Mushroom filter - is that the hks one?

Does your car still haev power? maybe the turbo blew.

[nismoskyline32]

my boost lvl is 0.8 bar

and still have power

[Godzilla32]

Try taking the filter off and going for a quick drive or just revving it and see how it sounds then...

If it has changed and wasent always like that then something must be wrong... Very strange for it to change suddenly.

[khunjeng]

I used to use the UniFilter oiled foam version. Ran for about the past 6 months, make massive sucking noise...more than most.

Now I have replaced with stock airbox and hi-low filter...only can hear the spool of my turbo...

performance difference...none

Gheyness factor of the air noise...10

Now thats one less thing I can be defected for.

[RaseR]

performance difference...none

Gheyness factor of the air noise...10

Now thats one less thing I can be defected for.

Spot on!

[MANWHORE]

Um, the Kunjeng and Rasr, those were excellent posts trying to help him diagnose his problem.

I've had a hks pod before. It made massive induction noise.

For it to have suddenly stopped making that noise, there must be something wrong.

Now, I don't know how mecahnically minded you are. I have a friend who always thinks there is something wrong with his car.

Is the noise actually totally gone? or just softer? Did it just stop one day suddenly? or it's softer over time?

Bov blocked/seized or turbo blown. That's all I can think of.

[Godzilla32]

If ther turbo was blown he would be making next to no power so thats deffinetly not the problem. If the blow off valve was seized there would still be induction noise but at a guess you would just get much more compressor surge flutter instead of bloww off valve noise/recirculation noise. Like i suggested try taking it for a short run with the filter removed to see if there is any difference. If there is then you know its directly related to your filter. If not then theres a change somewhere else in the system.

Deren

[Munkyb0y]

i've got an apexi pod. very loud.

check the intake pipe from the afm to the turbo, make sure it's on tight.

[wilch]

So there's no noise when you "release the (accelerator) pedal"?

No "pssccchhtttt" noise, when there use to be?

BOV jammed? Something to do with the BOV, or the recirculating pipe.... Pull it off, have a look.

[ali-turko]

i had these on my gtr and u could hear the spooling pretty clear but now i got blitz stainles stell ones which a very loud in my opinion and sound good