Quote:
Originally Posted by Skorov
That sounds right. But isn't that intended functionality? As in, the LTFT will correct any errors in fueling caused by MAF errors for example. If you remove that functionality then you allowing the error to go uncorrected. I must be missing something...
In EcuTek the map is called "AF Correction #3 Limit - Rear O2 Learning"
Thanks for your help! :-)
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front 02 sensor is used for fueling correction and is main 02 sensor, is only o2 needed for engine to run.
rear 02 for cat efficiency checks , and i believe cruise control and cruise fueling corrections. If rear 02 not disabled in rom then Cruise control does not work and you also get cels for secondary o2 heater circuit.
apparently your cruising fuel economy suffers without rear o2 sensor being disabled. due no AF correction #3.