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I had this issue - it was a failed O2 sensor (Driver side, Sensor 1 - which is the annoying upstream one), which was probably caused by a vacuum leak
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03-27-2018, 07:33 PM
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Base Member
Join Date: Oct 2016
Location: Los Angeles, CA
Posts: 74
Drives: G37S (370z+ seats)
Rep Power: 3364   |
I had this issue - it was a failed O2 sensor (Driver side, Sensor 1 - which is the annoying upstream one), which was probably caused by a vacuum leak somewhere. It wasn't a consistent misfire, but after replacing the O2 sensor and checking all the lines/intakes/wherever there might be a leak, the misfire went away.
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