2004 Hyundai tiburon GT V6
First had replaced in the beginning of 2018 by a mechanic shop, same symptoms started again last month with misfiring when idle and steady worsening to acceleration and then driving. Replaced gaskets in the title (spark plug 5 and 6 were the culprits, so MUCH oil in them) and worked PERFECTLY, a week later same symptoms and progressively worsening faster than before.
I checked my spark plugs this morning, all clean. No oil AT ALL, hooray! But now I don’t know what the problem is! The valve cover was torqued to 10-15. RTV placed too.
Also, my check engine light came on for a day but has been gone since but the problem is worsening.