Hello,
I have 09 es Lancer, a few weeks ago the engine light came on. I found out is misfired in cylinder 4. So i changed the spark plugs and still have the same code P0304. I don't want to change anything that may not be the problem. The car shake when it is stopped, there is no shaking while driving at all. Does anyone know what the problem could be?

Thanks in advance,

 

Try the coil pake