what can cause a skip in the engine? on 1997 Toyota Camry

the code read a misfire in plug #4 and we change it,still have the same problem. what to do now?

Asked by for the 1997 Toyota Camry
2 answers
Plug wire or ignition coil for that cylinder think it also fires # 1 cyl.
Good tune will prob. fix this!
maybe you need a tune-up