Question on loosing fuel pressure going down track.

[cmracing]

Originally Posted by Kirk Morgan

A lean miss-fire will show a rich condition due the un-burned fuel leaving the combustion chamber.

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.