P0301 Mazda -

Question

Well  I just replace the 4 injectors and 4 new spark plugs....shall I jump to just the 4 coils or what is you feel on tnis.

Answer 1

Hi there,

I would only replace the cylinder #1 ignition coil. Also, if the engine misfires at idle you could check for an intake leak. With the engine running spray some carb cleaner along the intake. If the idle smooths out or speeds up then it's an intake leak.