I want to check a cylinder for spark. In the old days you connected the spark plug to the wire external to the engine and looked for spark or attached a test light in the end of the wire. Are there modern tools to deal with coil on plug and the deeply recessed spark plugs?
Just pull the coil out as well.
Pull the coil keep it plugged in. Pull the spark plug or if you have a spare put it in the coil and ground the plug to something. Crank the motor and see if you got spark.
You may want to pull the fuel pump fuse before cranking it over.
Or with the car running pull the coil wires of each coil one at a time. When you get to the bad one there should be no change. Then swap that coil with another one and re test. If the miss follows the moved coil it is a coil issue. If the miss stays with the cylinder then you have further investigating to see if it is wiring or fuel or compression.
Pull the coil keep it plugged in. Pull the spark plug or if you have a spare put it in the coil and ground the plug to something. Crank the motor and see if you got spark.
You may want to pull the fuel pump fuse before cranking it over.
Or with the car running pull the coil wires of each coil one at a time. When you get to the bad one there should be no change. Then swap that coil with another one and re test. If the miss follows the moved coil it is a coil issue. If the miss stays with the cylinder then you have further investigating to see if it is wiring or fuel or compression.
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