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International Automotive Technicians Network
Re: 1998 Expedition missing the first half of the firing order
Posted to Technical Discussion Forum on 8/29/2025

I plugged the vehicle into identifix and came up with a hit with same affected cylinders you have. That hit had 18 matching cases, although they don't clearly specify affected cylinders, with PCM as the fix. Looking at the wiring schematic, I don't see anythi... Login to read more.