07cobaltowner

i recently found out about the secondary air injection on my cobalt, and still don't fully understand it. HackAbuse has been really helpful so far, but i wanted to see what everyone else knows. so far i know that... i don't know ****! lol.
please fill me in with what you know

here is what i found on this so far
https://www.cobaltss.net/forums/show...+air+injection

CTORANGESC

Really all it is, is a pump that pumps a small amount of oxygen into the exhaust stream to try and help out with the emissions

07cobaltowner

so can i put a little cone filter onto where it connects to the valve cover and put a 90deg elbow with some pipe to connect the air box to the throttle body?
i was thinking of using one of these 90's they look more effective than a regular 90
http://cgi.ebay.com/ebaymotors/Rubbe...spagenameZWDVW
what do you guys think?

also does anyone know off hand what the throttle body diameter is?
if not i will just measure it tomorrow

Halfcent

Read this:
https://www.cobaltss.net/forums/2-2l-l61-performance-tech-45/secondary-air-injection-late-production-2006-l61s-38488/

07cobaltowner

hmm... thanks HalfCent. i obviously was confused about it. its not the same thing i am talking about. what would you call the air tube from the intake passage to the valve cover, it branches off before the intake resonator.

Halfcent

Oh that. That's just the Crankcase ventilation. Yes, you can put a simple filter on that if you want. I assume you are using an aftermarket intake and need to hook that up, right? Its best if you can hook it up to the intake instead, but you'll be fine.