Quote:
Originally Posted by LSKustumz
It typically takes Toyotas 100-200 solid driving miles to get used to new mods. Be sure to vary your RPMs and loads to get all the different driving conditions so that your ECU can accurately adjust.
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Also worth mentioning: Something I learned while tuning Ford engines, but should apply to any closed loop, long term fuel trim.
You want to cover all different engine speeds and loads, but that is useless if it is too sporadic. You want to make sure that you drive with a very steady foot and maintain these certain rpms and loads for at least 10 seconds or so. If you briefly pass by a certain engine condition it wont be able to gather any usable data. It needs to stabilize, and gather some good data from the 02's in order to make a note of it and make a correction. The more methodical you are about gathering good data during different conditions, the
faster the ECU will learn and the
better the new tune will be.