Like the others have said, you need to add a lot more information about when and how it loses power. Also, include a picture of your engine bay, so I can see if you have the isolator system for your radiator lines. If you replaced the intercooler, and it is still segregated, you will have no fluid in the pump.

Are these things in your engine bay over near the coolant reservoir?
http://www.needswings.com/needswings...-isolation-kit