why is my no. 2 spark plug not firing? on 1994 Geo Prizm

why is the nimber 2 spark plug not firing when i have replace the plugs and new wires also.

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2 answers
I'm changing the value cover gasket on my car and I'm putting new rubber seals inside the value cover and I'm not sure if I'm putting them back on right can you please help me if you can?
is it coil pack or distitor, coil may be bad ck compression on cyl