What causes a Ford engine to run rough idle?
What causes a Ford engine to run rough idle? Touch the red meter lead to one contact and the black lead to the other prong. The ohm resistance number should be the about the same for all the injectors. If any injector reading shows a higher or lower than average number, the cause will be a defective injector, which will cause a rough idle. What happens to your car when you idle? A rough idle will result in intense vibrations forming whenever your vehicle is stopped with the engine running. Since less air will be going into the engine during...