I got codes p0301, p0351, p0352, p0354, & p0316. I have no clue where to begin. Any suggestions?

Question

I got the first 3 codes and after I fixed coil one and changed all the spark plugs (I left the second one alone cuz it didn't look damaged ) I still got the same codes but then the last 2 were added. Coil 4 looked good wheni changed the spark plug. I don't even know where to look to check the crankshaft position sensor. Any help would be great.

Answer 1

P0301 Misfire number 1 cylinder

P0351 Ignition coil A Primary/Secondary circuit

P0352 Ignition coil B Primary / Secondary circuit

P0352 and P0354 and the rest of the code are all pointing with the coil causing the misfire, this can happen when the connection to the coil are poorly mated, that or it is a faulty coil., the coil may look good but it may not be firing Swap ignition coil number 1 cylinder with a different cylinder and if the misfire moves replace that coil.