Friday 14 November 2014

fuel trims and their diagnostics power

Fuel trims?
Not that complicated really the engine in an ideal world needs no  fuel  trim corrections to  keep things centred around the 14:1 ratio.
As things change in the engine and its state so the engines ecu  needs to either  add or subtract fuel ie air leaks cause  +values or fuel added to allow for  the excess air drawn into the engine


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