CHECK ENGINE! i did what you guys told me to do. I went to autozone and got the cel and it was P0420 and P1456. I tried looking in the sticky for check engine lights in the under the hood form but im still clueless. What am i suppose to check? I double checked all the vaccum lines and everything is ok. So now im just stuck... Any advice or help would be really nice....

 

I would triple-check the vac lines again... make sure that they are hooked up in the right order. Check out this thread courtesy of Xviper...

https://www.s2ki.com/forums/index.php?showtopic=105368

 

Double post in two different forums.

Those codes have nothing to do with your CAI. I answered you in your other thread.