[empower-auto]

I wonder if this could explain my phantom misfiring that had no other explanation.

My car twice in 2 years has started brutally misfiring at idle and continued to for about a week or two .. then suddenly returns to normal operation.

Every last ignition and fuel component was tested -- I even (I was going to upgrade anyways) replaced port injectors and my plugs. Nothing ever made a difference except time. The only code ever present was P0300 which is not very helpful.