blackmagic

I installed the stillen 3rd gen intakes on my 2009 370z. After the install the car will not go passed 2k rpm and the check engine light came on...the car wont run right at all. Where did I go wrong on the install? If anyone knows what it could be or experienced the same problem feedback would be appreciated. I disconnected the negative terminal and I put both the mass air flow sensors back on. I did notice when I took apart the stock intakes on the passengers side there was one breather tube and i hooked that back up as well. on the drivers side there appeared to be two breather tubes on the stock intakes....one of them looked similiar to the passengers side but the other one was connected to a little box. When I put the stillens on i only connected the one that looked similiar to the passengers side because there is only one connection for the breather tube on the stillen pipe..so I basically took that little breather tube with the box out completely. Again if anyone knows where I went wrong or whey my car isn't working properly please help! thanks