Original post by: Carlos Ramirez ,
Have you replaced the plugs on it? I'm not sure if that model has it but if it has the spark plug wires, those need to be replaced when the plugs are replaced. If the plugs haven't been replaced, use NGK or ACDelco branded plugs and if possible, pre gapped. It could be misfiring because of plugs, even if they are new. If that doesn't help, it is possible then the distributor is out. But I would check that out first since plugs and wires would be the cheapest, especially if they haven't been replaced.