1997 Ford expedition 5.4

[dev199505]

Have a mechanic look at the engine. Be patient. What you don't need is a headache and a money pit.

My uncle works at LKQ which is a salvage yard that sells to a lot of shops so if I need anything I can get it from him

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[stamp11127]

Please check the following link:

https://www.ngksparkplugs.com/about-ngk/faqs/spark-plug-faqs/what-is-a-fouled-spark-plug

How will age provide one or more of the three conditions? Plugs will wear from use but doesn't foul them.

Plus these are lean burn engines.