These Sensors were in for 2yrs from auto parts store. Yeah live data have those misfiring close to 500 times each. Then unplugged them and no misfires on 1,3,5,7 and then it moved slight misfiring on 6 and 8. That's why me and my mechanic are so confused
About a week ago my 2004 Yukon Denali started misfiring on 1,3,5 and 7 and then I unplugged my 02s on passenger side and drove perfectly fine. Replaced all 02s and drove fine for a night then back to crazy misfiring and now unplugged all 4 and it drives like nothing is wrong.......sooooooo lost!
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