I misshifted from 2nd gear to 1st causing a massive but quick overrev to about 8000rpm on my 2008 Corolla S, now i have a spluttering idle and high-pitched ticking/knocking noise from the engine when reving, the engine still runs fine and i DONT feel any power-loss or vibration during reving, i did a OBD diagnostic and got a code for "4th cylinder missfire".
Im being told by some its a bent valve, and others say my car would not run or run extremely poorly with a bent valve.
Any suggestions?

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