I have a 99 SH. Problem I'm having is I'll be driving and out of nowhere the car will start running terrible. Car will sputter really hard driving down the highway. When I have to stop and stoplight and push the clutch in the idle drops all the way and the car will die. I start it and have to keep giving it gas to keep it running. Then when I take off it sputters really bad and will just take off all of a sudden. It just does it randomly and when its not doing it the car runs awesome. I borrowed my friends scanner and it did it today. It came up with code PA1129 MAP higher than expected. Just wondering what would cause this. The engine itself is all stock. Has the stock intake and looking at the engine everything seems fine as far as all vacuum lines being hooked up and MAP sensor appears to be fine visually. Searched the forum and googled it and not much help either place. Any help here is appreciated.