Car is making a BOV noise.

[evil_demon_01]

Okay, today I was showing the new parts to my brother-in-law. I shut the car down while he was still looking under the hood, and he said that when I shut the car down there was a noise exactly like the one I'm talking about from the short ram. He said it went "pffft" like it was releasing a little air pressure. So now I know where it is, just not why.

Releasing Vacuum not pressure.
If in fact you can release vacuum, I suppose the correct terminology would be Replacing vacuum?
Either way, its normal and noticable when turing the car off - My intake manifold holds vacuum for a good 2-3 seconds after the engine is off, which is where the noise comes from as the negative pressure is replaced with atmospheric pressure through the throttle butterfly

[visualpoet]

Releasing Vacuum not pressure.
If in fact you can release vacuum, I suppose the correct terminology would be Replacing vacuum?
Either way, its normal and noticable when turing the car off - My intake manifold holds vacuum for a good 2-3 seconds after the engine is off, which is where the noise comes from as the negative pressure is replaced with atmospheric pressure through the throttle butterfly

That's it! I knew someone on here would have the answer. It also explains the noise I originally posted about. Sweet. Thanks for the enlightenment.