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Originally Posted by K-MU
Would it be OK to just reset the ECU or is it recomended to do the whole thing (all the procedures)
I want to do it ASAP...
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You could do just the ecu reset, if all you want to do is clear the ram after doing a performance mod, but I think the procedures do go hand in hand. I believe part of the relearning the ecu does after a reset is learning your driving habits, i.e., how fast you drop the accelerator, the distance the positioners travel, etc. So to me it seems important for the ecu to see the correct voltage values when the accelerator and throttle valve positioners are at their min/max extremes. An occasional recalibration sure can't hurt, and could help a great deal.
In my situation, I tried just the positioner relearning procedures a while back to see if it would cure the idle problem I mentioned....and it did. It didn't seem to change the performance much, if any. However when I came across the ecu reset procedure from Technosquare which recommended doing the reset, followed by all the other relearning procedures, I did it and the notice in low end power was very noticable. I don't fully understand why, because I've done the reset several times before using the battery disconn method after doing mods and never noticed an immediate improvement, which was expected as the ecu needs time to relearn the increased airflow seen. So why wiping the ecu memory clean and then doing the positioner relearning procedures netted me more low end torque, is a mystery to me.
This is how Technosquare does it, and they do know a little more about this ecu stuff than me, that's for sure! Like I mentioned, I think it's a good thing to do periodically, regardless of whether or not you see any performance gains from it. It can be a pain to get the timing down on it (esp the ecu reset and idle air learning) , but it's not too bad once you do it a few times.