2011 Accent misfires but no code comes on. changed plugs and fixed for a week. Now its back. any ideas. Thanks.
I added seafoam to the gas tank, twice. ran 6 to 8 tanks now and no change. I did the plug change twice and it fixed the problem both times for a few days.
This is the same problem with the plug coils. It eventually gets so bad, the light comes on. These coils go bad often. You don't know which one it is untill the code tells you. You can change them one at a time and you will get to the bad one.
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