at 50 bucks apiece I wouldn't waste my time with used. Will propbably be more of a headache than it's worth. Is your code showing #4 ? I have 98 and 02 xpeditions since new and had to replace #4 cop on both. 98 @150K miles and 02 @ 142K. fixed problem and runs as new.
Sorry Dude, but I wounld't waste money on used parts for anything for a Ford. ONLY buy new parts for a 5.4 Liter. HAd the same with mine and replaced ALL 8 of them and runs like a new truck again.
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