Quote:
Originally Posted by Kirk Morgan
A lean miss-fire will show a rich condition due the un-burned fuel leaving the combustion chamber.
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A wideband sensor will show a lean miss-fire as a lot of excess oxygen in the system, fooling you into thinking the engine is running lean.
A severely rich mixture will also show as a lean condition on a wideband sensor.
Spark plugs and header tubes don't lie.................. But the widebands can.