Jaguar Repair Using Fuel Trims

This information and check procedure has been provided by Steve P.  It covers OBDII, or on board diagnostics 2ND generation It has to do with two things.  One, to consistently control the engine fueling to maintain a stoichiometric [or 14.7 to 1] air fuel ratio; and two, to monitor things and alert when it canít do that.  I hope this information helps.

OBDII - Short & Long Term Fuel Trims

OBDII - Using Fuel Trims for Diagnostics



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