I have an AEM V2 cold air intake on my car. Yesterday, I unhooked it because I was going to put the stock airbox back on and sell the Aem intake. Once I got it off, I couldn't remember which way the vacuum lines were routed with the stock parts... So I put the AEM back on, and my check engine light came on. I've got everything hooked up the same way it was before. There is a small sensor the vacuum lines run to that mounts on the side of my intake piping. I figured it just threw a code, so I disconnected my battery to see if it would just reset itself. The check engine light hasn't come back on, but my car seems to be idling at lower RPM's than it was before. This is causing my car to shudder whenever the ac comes on while idling... Any suggestions? I don't want to just idle it a little higher if something else may be wrong. Any help is greatly appreciated

 

Check all of the black tubes. Make sure they are all connected. There are two the are next to the fuel rail that like to come off. Check those too.

 

That was the first thing I checked. I put the lines on backwards when I first started the car, noticed that the sensor was making a hissing noise and switched the lines around. Idle seemed to level out and it runs fine other than acting like it's going to stall whenever the ac compressor comes on

 

Try cleaning your IACV. You'll find a DIY in Under the Hood.

 

I tried searching the Under The Hood Forum, but all I can find is where people are saying that there is a DIY

 

https://www.s2ki.com/forums/index.php?showtopic=548714

 

I just did that james car idles a lil bit better.

 

Thank you. Saved the page under My Favorites for future reference. Hopefully that will do the trick. I tried some Sea Foam through the throttle body and it seems to be doing better

 

Woot Woot hey Vanz ask James about the PPD he can explain it better than me

 

make sure no air is leaking in one of those tube in the vacumn, i've had this problem many times, and lost psi on the supercharger.