I cant get rid of my misfire codes.
I have changed plugs, seafoamed the engine.
And they continue.
Could it be the O2 sensor?
Or would the O2 sensor set off a seperate code.
I have also tried a different coil. That has no effect.
The misfire code starts with the #1 cylinder, then goes to others.
Car runs fine. You can't feel the misfire.
Any ideas?

 

it might not be the actual coil, it could be the boot of the coil. i would check all the boots and make sure there are no hairline cracks

 

it may be more than 1 coil, it may be more than 1. It could be the 02, it could be some wiring, or it could be the ECU