Sunday 29 January 2017

ECU - AFR Targets and Cold Start

Finally the weather warming up to around 8ºC.
~10ºC is my rule of thumb for when driving the Zero becomes fun rather than asking for frozen hands/ears, in the garage I no longer get instant frozen fingers from picking up any metal tools.

A little tinkering with ECU settings.

An employee of Emerald who is active on the GBS Zero Facebook pages has been incredibly helpful with advice and some new settings to try. I also ran another round of cold-start adjustment. 

The current settings are listed in full on the ECU page, broadly the following has changed:
  • Some Emerald expert magic in the ignition and injection tables
  • Semi sequential injection enabled - so fuelling timed closer to when inlets are actually open
  • 850rpm idle column added in all tables - to help stabilise idle
  • AFR Target table adjusted for leaner run in the idle/cruising area
  • Lambda settings modified
  • Cold start settings modified (again)

My primary map has the new flat/economy AFR targets on less than 30% throttle, secondary map remains on the power-map targets,  both still in adaptive for now to let it learn appropriate fuelling.


Target this year is to take the car through MOT early March, so I sync the annual test around summer driving months rather than having to cross that bridge mid season each year.

Starting to think about road trips... couple of ideas on the cards.

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