Thread: Air Filter?

You removed the tube that runs from there to between the MAf and TB. So... that should give you a fairly decent vacuum leak. [read: Put it back.]

with that in mind, you'll want to completely block it off. not filter it.

(assuming you cant hook it back up since you removed what it was connected to)

Originally Posted by SlowNA06

And with the vacuum leak it creates, you'll eventually break your engine.

QFT.

Wow guys.. let's not bother to tell him what that nipple of happiness is for. "you'll break your motor" hahahahahahaha...probably true.

That nipple goes to the PCV and should be reconnected to a port in the intake before the throttle plate.

Well sh1t I wish I knew that before now. Okay well my setup is a Gen V, TB adapter plate, L67 TB and ZZP CAI. What's my best route to fix this? I will do it tomorrow.

Edit: would this cause any power loss?

That's the crank case ventilation hose. Its function is to allow air to come into the crank case. Then there's a vacuum (pretty much sucking up the air in the crank case) hose connected to the crank case through the pcv valve(some cars don't have a pcv valve) that suck out all of the blow by gases (gases that make it past the piston rings) and this vacuum improves piston ring sealing (That's why people run vacuum pumps)

So putting a filter on there will allow the crank case vent to do its job, the only issue with it is that little bit of air that it lets in is unmetered (not picked up by the maf to tell the car how much air is coming) The car will self correct itself at part throttle but at wide open throttle you may end up slightly leaner. You may throw a check engine light for a lean bank(s). Some cars do and some cars don't.

Originally Posted by SlowNA06

You removed the tube that runs from there to between the MAf and TB. So... that should give you a fairly decent vacuum leak. [read: Put it back.]

It's not a vacuum leak, vacuum is after the throttle body, anything between the maf and the tb is metered air.

Originally Posted by Jakegday

with that in mind, you'll want to completely block it off. not filter it.

(assuming you cant hook it back up since you removed what it was connected to)

You never want to block it off, you will have piston ring sealing problem and have leaky gaskets because you will build up pressure in the crank case.

Originally Posted by SlowNA06

Without tuning it out and blocking it off, you won't pass emissions. And with the vacuum leak it creates, you'll eventually break your engine.

My Gto and Trailblazer SS passed NJ state emissions with a filter in place of the crank case vent line.

Originally Posted by footballplaya3k

So running a tube to the intake, anything in front of the TB, will do nothing different than just having a filter on it, correct? Because either way its letting unmetered air in.

Anything after the maf sensor is metered air.

Air between throttle body and and maf sensor is at atmospheric pressure.
Air after the throttle body is vacuum.

Running the crank case with a filter on it will do the same thing as running it through the intake except, the crank case filter is letting in a small amount of unmetered air in which the computer will correct for at part throttle.

When he says in the intake he means between the maf and throttle body. Which is metered air.