For 2003 Ford Expedition there are 4 different engines:
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For Expedition 4.6L engines: Firing Order 1-3-7-2-6-5-4-8
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For Frod Expedition 5.4L engines:
Firing order 1-3-7-2-6-5-4-8
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Ford Expedition 4.0L engines:
Firing order 1-4-2-5-3-6 ---
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For Ford Expedition 6.8L engines:
Firing Order: 1-6-5-10-2-7-3-8-4-9
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