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check all the basics, and how do you know it's the number one cylinder? are you disconnecting the plug wire while the engines running? you may have a bad valve or cylinder...compression test..etc..also, could be no spark for the #1... a manual will help with diagnosis and repair, and a shop manual should be available at the local library in the reference section, make copies of the right pages, good luck...:)

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Q: What would cause your 2002 Ford ranger to have a miss fire on the 1cylender Once you have already changed the plugs and wires.?
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