03 Sunfire with the GM supercharger kit
On the way home from work car didn't seem to have the same get up and go to it. Glanced at my boost gauge and I was only making 3 psi (gauge fluctuated between 3 to 5 psi.. I usually see 8-10). I can still hear the whine of the charger trying to build boost.
check hose leak,and wastgate for vac line leak
Read on here in another thread that some times the cold can make a bypass valve stick, was it cold in your area at the moment of boost loss? That could be it.
It was the BPV.. except the spring was rusted so bad it snapped instead of the diaphragm ripping
