Question about 2003 Ford Expedition
It sounds like a bad injector. Swap injector with another cylinder and see if code changes.
Posted on Mar 14, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
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First, are you certain you changed the plug for number 1? If so, check the power connection to the COP. If it is dirty or loose that can cause a misfire also.
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