I'm getting a P0301 report. The car has been a little jumpy lately. I replaced the spark plug on cyclinder 1. Thought it ran better. But the car is still giving me the code. I think the injectors are fine. The spark plug didn't have any oil on it and what white powdery. I am going to replace spark wires and all 4 spark plugs as it has 92,000. I'm thinking it could be an ignition coil going bad? Or maybe just the wires are old? Any thoughts?
If you suspect one of the coils is going bad a way to check that which Scotty has shown is to move the suspect coil to another cylinder and see if the misfire shows up on that cylinder.
Here is some more info on that code:
https://www.fixdapp.com/blog/p0301-code/
Thanks for the comment. Unfortunately this car does not have a coil over each cylinder. It has one coil pack that feeds each cylinder in the required order. Thanks again.
I just looked up a picture of that coil on rockauto.com - definitely makes diagnosis more difficult. You could try switching wires if that's possible to see if it's a bad ignition wire.