Squeaky noise probably is your alternator belt squeaking. What happens when you give it gas? Does it respond normally, or choke?
Most likely what you've got is a boost leak. I recommend checking your intercooler piping with a home-made tester like this one:
http://www.vfaq.com/mods/ICtester.html
if after a visual check, you still can't spot a leak.
The other things it could be are bad MAF/MAF wiring (doesnt sound like it, but I'd have to see how it rev'd to know for sure) or timing? Did you set your timing?