Posts Tagged: engine rough idle

Why Your Engine Has a Rough Idle and How to Fix It for Good

The Real Causes of Rough Idle and High Idle Quick Summary When I diagnose a rough idle, I start with airflow. In my experience, most rough idle problems come down to vacuum leaks, carbon buildup in the throttle body, or idle air control issues. If those check out, I move to ignition and fuel problems like worn spark plugs or clogged injectors. Fixing the root airflow issue first saves the most time and money—and it solves the majority of cases Why a Rough Idle Happens Over the years, I’ve diagnosed … Read More