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Help! Catalytic? Sensor? or something else?
Not long after buying my 03 expedtion 5.4 started missing and running crappy on the low end. I was told by someone he saw something like fireballs fly out of my exaust as I was climbing mountain so, I had a tune up with plugs, boots and such... The expy started running better but still sounded...- medtrust
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- Forum: 2nd Gen Ford Expedition Engine & Performance
