So this is a couple possible things. Is the P0301 the only code that you have?
If it is, the best thing to do is swap things from this cylinder to number 4 and see what causes the misfire to move cylinders. Even though the plugs, wires, etc are new, you still want to swap them because they can still be the issue.
https://www.2carpros.com/articles/engine-misfires-or-runs-rough
Basically the idea is to move things one at a time including, plug, wire, injector to number 4 and run the vehicle after each clearing the code each time and see if anything makes it go to number 4.
Let me know if you have questions. Thanks
Saturday, May 2nd, 2020 AT 5:51 PM