I was driving my daughters 98 Grand AM pulled up to a stop sign and all the sudden it started bucking & sputtering then died. It will start but feels like it is missing out bad engine shakes real bad. I've changed the fuel filter & looked for vacum leaks could not find any also checked plugs and did compression test. Finally got the engine light to come on after running it for a while code P0300. Thanks for reading and any suggestions you may have.
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