The check engine light shouldn't come on if you installed the blue box correctly. I have a very similar setup with the greddy kit and I have no check engine light. Make sure the splices are correct at the ECU. That is usually the cause of it.

And for HP, you should probably be running about 215whp untuned. I am getting an E-manage so I can tune because the blue box blows ass. I run so rich that smoke comes out of my tailpipe.

You should have gotten the aluminum flange for the BOV. I don't think you can weld steel to aluminum very easily....

PM me if you need some more help with this kit since I installed everything on mine myself.