Great Lakes 4x4. The largest offroad forum in the Midwest - View Single Post - misfire on 2 4 6 and 8???????need help
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Old January 31st, 2013, 08:55 PM   #6
ssgtgaines
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Have seen upstream o2 sensors fail and read lean. So the ecm will dump a bunch of fuel in that bank. Usually you will see black smoke out of the tail pipe, and you can smell the gas. It may not set a code. If you have a scan tool you can look at the o2 voltage and see if its switching from around 200-800mv. But you need a good scantool not a code reader. Good luck.
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