My 2002 SS Convertible has low miles and only comes out on nice days. It only has 20K miles on it. Last weekend we took the car for a ride and it ran very rough. I used a code reader and the code read, misfire on cyl #1. I switched coils and there was no code but it still ran rough. I purchased a new AC Delco coil and replaced it. No improvement. I checked for codes and the new code read "multiple random cylinder misfire". I don't know where to turn next. Can anyone offer direction? The car is mostly stock except for some SLP goodies.