Spark plugs: Piece that produces the spark inside of the engine. It turns on the mixture of air and fuel that enters into the cylinders.
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It is made up of an electrode (the tip where the spark burns), a metallic nut, a white ceramic insulator, and a connector the spark plug's wire is connected to. It is tightened around the cylinder head. The engine usually has one spark plug per cylinder.
I've finally found the cause of my problem. It was the Chevystar, which I always thought was desactivated until my van was blocked by it. I've removed the Chevystar and everything came back to normal.
I replaced the ignition pick up coil the ECU distributer cap rotor ignition coil
And still no start :( I am not getting spark to the spark plugs please help