How should the ignition coil be checked?

It's not that complicated. Like my single type and cylinder line type of these two coils, in the state of driving, you can check by pulling the plug or high-voltage line one by one, pulling out the engine shake has not changed, it means that there is a problem with the ignition of that cylinder, and then swap the coil with other cylinders, you can determine whether it is a coil or a spark plug problem.

Today's car fuel injectors are generally rarely broken, basically spark plugs and coils, and car owners with strong hands-on ability can completely check by themselves. The integration of this is more troublesome, ordinary car owners want to check the plug that can pull the fuel injector to determine which cylinder is on fire, and then check or judge the spark plug.