DIY: Dual Catch Cans with Air/Oil Separators... On the CHEAP!

DIGItonium

Just want to give you guys a heads up about what sort of hoses to use when routing lines to your catch cans, manifold, and PCV. Stay away from silicone hoses. Use fuel line or PCV hose, which is rubber with some sort of nylon reinforcement. It won't deteriorate from the hot oily gases, and it can handle pressure better than a regular silicone hose. Below is an example of the kind of hose you should use:
http://www.amazon.com/Gates-27004-Fu.../dp/B0002JMFM0

My engine had some fairly bad idle surging, and after a few weeks noticed the hose was "sweating" oil from the PCV on both sides. I cleaned and further tightened the hose. After a few days one hose broke clean while driving causing some bad idling issues, throttle problems, and threw a code.

My idle surge isn't completely gone since it's possibly a tuning issue, but I'll continue to monitor my catch can setup to check for kinked hoses under vacuum, leaks, etc.

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