P0308 is a diagnostic trouble code (DTC) that indicates a misfire in cylinder 8 of your 2000 Cadillac Eldorado. The code is set by the engine control module (ECM) when it detects that the engine is not firing properly. This can be caused by a variety of factors, including:
* Faulty spark plug or spark plug wire
* Faulty ignition coil
* Faulty fuel injector
* Vacuum leak
* Compression problem
If you see code P0308, you should take your Eldorado to a qualified mechanic for diagnosis and repair.