Suction noise after catch can install

GDI Tech · March 23, 2016

I have 2000 miles on my truck and took the hoses off today and looked in the throttle body and intake etc and didnt find a drop of oil. Is that odd? I took the intake and the vent tubes off to install my Airaid intake.

You would need to look deep into the intake manifold itself as the point of ingestion is midway back in the IM so you wont see any around the TB on most rucks. Inside you will see oil pub=ddled in the bottom between the support ribs that are molded into the bottom of the IM.

camcamaro1991 · March 23, 2016

Guess I'm one of the at home amateurs but hose was sucking almost flat. I posted a vid as well. Trans hose 3x the PSI and doesn't deform any. 6 bucks.

The hissing is normal, just air passing through can and the check valve. If you pinch the pose together to stop air flow you'll hear the sound stop.

jrob56, oh I believe you. looking at the factory OEM plastic hose's, the OEM plastic gets brittle and cracks, but rubber gets soft, so I am up in the air on the hose thing. I was hoping the catch can guys would offer a complete plug and play option with OEM connectors & hose's for the install. Good thing is you can cut the plastic off and 3/8 fits the factory barb's and the quick connect works good (someone posted that video)

cmatt · May 23, 2017

I hate to dig up an older thread, but thought it made sense based on my findings to help others.

I just installed an EX-2 catch can on my 2015 Yukon and also have what sounds like a vacuum leak. It stops when I compress either the dirty side or clean side line. I took a video. If the sound is determined to be "normal", then others can compare to their own. I also took the fittings off and found something interesting on the clean side line.

Notice how part of the hose separated or was cut by the fitting.

Hose type that's included

Sent from my iPad using Tapatalk

cmatt · May 23, 2017

Crap. How do I upload a video?

Sent from my iPad using Tapatalk

NomadicCPO · May 23, 2017

Installed my Elite E2 and immediately after starting it noticed the same noise. Checked all the connections and they were as tight as can be. Figured that if it was a vacuum leak, I would see the CEL come on. It never did. It is definitely catching a lot of fluid, so I suppose the noise is normal.