Why does my Ford Ranger have a low rough idle?
Why does my Ford Ranger have a low rough idle? The truck was idleling smooth and drove fine. The truck always started right up. A day maybe two after changing the plugs, I started noticing the low rough idle. As well the battery gauge would fluctuate up and down (maybe a 1/4" of movement). However, as long as I was driving or giving it gas everything was stable. What causes an uneven idle on an F-150? A uneven idle on a F-150 can be a symptom of a variety of engine issues such as vacuum leaks, failed or dirty sensors...