On a 1995 Hyundai Accent the check engine light is on it will not start in the morning the spark plugs air and oil filters has been changed starts fine in the afternoon?

How long has it been since engine filter, fuel filter, & air filters have been replaced? I have a 95 Accent, bought new & it still runs great daily. Both outside door handles crumbled & fell off - but it runs great. I have it serviced every 6 months. Had all hoses & belts replaced as a precautionary measure. You might be surprised at how well your Accent runs & performs if you replace the aforementioned filters.