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Originally Posted by plnoldrick
actually im going to have to disagree on that. setting the base idle is obviously the BASEline but the ecu also needs to write in how to shift the iacv duty cycle to deal with different loads like headlights and air conditioning. so basically it is a learning formula of sorts. it shows itself clearly in the driving cycle information if the idle learn isnt done on the car. granted the ecu does have its base enrichment percentages for idling with headlights or a/c but its also subject to enviroment like fuel trims so it needs to be set initially.
there is a lot more data on this stuff that is not in the helms manual. i'll see about getting my buddy to print out the advanced diagnostics stuff from honda.
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So you're saying that if you do steps 1-5 but not steps 6-10, then your idle will start messing up later? I'm pretty sure I've reset my ECU many times without doing steps 6-10 and I don't recall seeing any places in the Helm's where it tells you to do 6-10 after every ECU reset. Why would the ECU have to "write in" anything -- all it has to do is look at the actual idle speed, compare with the desired idle speed, and adjust the electrical current through the IAC accordingly. This is something that it should be doing continously anyway.
I would be very interested to see any "extraHelm's" material you can get on this...