You can find an inexpensive tool at your local auto parts. This works best.
The upper face of a piston assembly is called the crown or piston crown. It is the top surface of the piston that comes into contact with the combustion gases during the engine's operation.
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http://www.p71interceptor.com/firingorder/
Do you have the wires in the correct order ?
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Knowing the firing order of a car's engine can help with engine issues later. The firing order for a 1986 Ford Crown Victoria is 1-5-4-2-6-3-7-8 .
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