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Thread: Microprocessor controlled idle ECU

  1. #61
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

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    Quote Originally Posted by bytes311 View Post
    Hi Dave,

    Does the ECU lose all its learned values after the battery is cut off?
    No. It keeps any learned values with no power.
    Dave M vin 03572
    http://dm-eng.weebly.com/

  2. #62
    absotively posilutely bytes311's Avatar
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    Quote Originally Posted by Bitsyncmaster View Post
    No. It keeps any learned values with no power.
    Cool, thanks!

  3. #63
    absotively posilutely bytes311's Avatar
    Join Date:  Sep 2014

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    Club(s):   (NCDMC) (DCUK)

    Does the mixture change a little if the idle is set higher than 750 RPM? I hooked up my dwell meter and noticed the needle swinging more towards the rich side of the spectrum but still within range for the FV to buzz.

    I have the idle ECU set at 850 RPM. I removed the diode, backed out the idle screw, and adjusted the curb idle as instructed (using the LED on the board as reference), but nothing else has changed as far as I know.

  4. #64
    Senior Member Bitsyncmaster's Avatar
    Join Date:  May 2011

    Location:  Leonardtown, MD

    Posts:    7,727

    My VIN:    03572

    Quote Originally Posted by bytes311 View Post
    Does the mixture change a little if the idle is set higher than 750 RPM? I hooked up my dwell meter and noticed the needle swinging more towards the rich side of the spectrum but still within range for the FV to buzz.

    I have the idle ECU set at 850 RPM. I removed the diode, backed out the idle screw, and adjusted the curb idle as instructed (using the LED on the board as reference), but nothing else has changed as far as I know.
    I've not seen it change mixture much with changing idle RPM setting. I guess it would depend on how good your FD is working. I have seen better more stable readings at higher idle RPM which I think is due to the non-heated O2 sensor running a little hotter. Maybe that is why the book says to adjust mixture at 900 or 950 idle RPM. You really want the mixture centered at cruising RPM anyway.
    Dave M vin 03572
    http://dm-eng.weebly.com/

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