pbrx7

hello everyone. I'm having a problem with my seven and a friend said to look here. i have an 87 n/a thats all factory except for a different intake and a demon carb. yesterday i was doing some maintenence and the car was idling in the driveway. after a while it started to run poorly. acted like it was flooding out. the first thing i checked was the fuel from the carb because its a fairly new setup to me. everything checked out. after looking some more i found out the spark was slowly going away. at first i had spark, then it got weaker, and now its gone. i checked the coils and CAS according to my haynes manual and they checked out ok. I'm at a loss. if anyone has any suggestions please help. thank you. Paul