A flickering check engine light with rough idle on a Ford Edge II often points to ignition coils, spark plugs, or vacuum leaks. Here’s how to diagnose it safely.
If your Ford Edge II is idling rough and the check engine light flickers on and off, don't panic. This combination almost always points to a misfire condition. The flickering light means the engine computer is detecting a misfire that is active but not severe enough to continuously set the light. In plain terms, the engine is missing small combustion events, and that causes the rough idle you feel. Let's walk through the most common culprits on the second-generation Edge.
