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What causes rough idle on 4.6 expedition?

Updated: 10/26/2022
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Ashcarlos7

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15y ago

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Auto Zone will read your computer codes FREE.... No more guessing... On my 1998, Ford Expedition XLT (4.6L) I had the same problem It ended been bad spark plugs. Therefore, I change plugs and wires. Problem was solved.

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Q: What causes rough idle on 4.6 expedition?
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