I have a 2001 olds aurora 3.5v6 i took my car to auto zone and they put tester on and it read the number 6 is misfiring so i changed all 6 plugs and the number 6 boot still misfiring
I had same issue, it was the coil.
I hope you didnt put BOSCH plugs in? Next there are coils, and injectors. Nothing cheap. I would stay awat from ottozoo, all they want to do is sell you cheap parts. You will need a qualified repair shop check it out and recommend repairs.
Did u change your spark cable? hum try that good luck
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