My 97 honda prelude is stalling i have tried all sorts of things!?

Today I put in the sea foam, engine restore, changed the spark plugs and cleaned the carburetor. The engine is still stalling. My check engine light is on but the guy at auto zone said that he could not find the plug for the computer. I'm kinda thinking its the O2 sensor now. The car will start up fine and then randomly shut off while i'm driving. I will then try to start the car again and it usually takes 2-4 start up attempts to get the car started again. Once started the car will run fine until the same thing happens again. please help if you have any suggestions.