Originally Posted by IQRaceworks

I think it's pretty obvious that something is wrong. You need to go back and check everything you changed or replaced. Did you accidentally pull off or crack a vacuum line fitting? Are the intercooler clamps and seals both installed correctly? Are there any loose plug wires?

Did you do the work, or did you have a shop do it? With all of the things that have to be removed/pulled off/and reassembled......odds are you have something that didn't get put back together right. I'm betting on a cracked vacuum hose or fitting.