i feel very confident in saying that is your problem. Its really not too bad to do, especially if you don't take the supercharger out of the car. The MAP sensor on the back of the supercharger is very difficult to unplug.
Can the nose be replaced with the supercharger still attached to the engine? What about this one? http://www.ebay.com/itm/Rebuilt-Ran...e=STRK:MEBIDX:IT&_trksid=p2060353.m1438.l2649