1996 Pontiac Bonneville Fuel problems?

1996 Pontiac Bonneville Automatic

My car has randomly been dieing on me and I cant figure out why. I've checked all of my fluids and they're fine. I think the computer in my car is messed up because the digital clock goes all crazy and its also hard to read what radio staion its on. Also my Check engine light is always on. Anyways, when I start my car it sputters like its running out of gas but i've kept a full tank it it. My car will rev up on its own and is sometimes ok after that but not always. It usually dies when im slowing down but other times when im just driving down the road. A friend had told me it could be the fuel injector. Others have told me I could need new spark plugs or to change my fuel filter. Im very unsure of what to do or what the problem could be. If you could possibly help me out on this I would much appreciate it! Thank you.