My car sounds like a vacuum. It's very prominent, coming from the engine bay. I know it's there at idle, and it stays after a drive. I took the top of my intake box off, so the air filter is exposed. Could that be causing the problem?

I haven't really played with much to diagnose it yet, I'm hoping it might be a known issue that others are having and its either A. easy to fix, or B. a non-issue

The car seems to drive fine. 105,000 miles, it's stock MY01. I'm not sure if the sound was there when I first got it. Someone pointed it out to me or I probably wouldn't have noticed. Now I notice it all the time.

Any ideas?

Since I've gotten the car:
I've Replaced the clutch
I took off the intake box top
The temperature went up

Thanks

 

so you took off the air box lid and you suddenly have a vacuum sounds?

well, you can think of the motor as a vacuum drawing in air with each stroke, removing the air box lid defeat the intake resonator, i believe that's your primary cause of vacuum sounds problem.

ar...taking the lid off the airbox heat soak the car, a lose lose situation there

 

I'll put it back on in the morning and see if it goes away.

Thanks,
e39m5

 

The reason the air filter is in a box is to reduce the sound a open element air filter makes. Put the lid back on if you don't like the noise.

 

What a novel idea!

 

I am pretty sure that is the sound of air being sucked into the air filter. It should of a loud lovely sound. Sounds even louder with my CAI...

 

Yep. its very noticeable. Even a K&N intake has a slight whistle. much more subtle than a open top OEM box though.