im not overly sure, boost alters the spark map ,so if the map sensor is faulty it could affect it........

Have you washed the car,or topped the header tank up , cos thats how mine packed up, was fine i washed it and wouldnt start after , i just unplugged the map and it started up ,

Took the sensor off and took it apart and it was full of water ,shorted out......replaced it and was fine.