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Thread: ECU swap help

  1. #1

    Default ECU swap help

    I replied to an old thread in General Discussion. No replies so posting new thread.

    EDIT: I'm guessing it would be easier going with another JDM ECU because of EGR? My engine is JDM and has no EGR.

    Have to replace my ECU. Mine is 89661-2B280 which from my research is a 92 JDM.
    I found one for sale that says its a 92 but its CND 89661-20760.

    Comparing the pin out diagram I will have to move some pins but what about the missing or added pins? And the FC is on a completely different plug. Ugh!
    Added:
    EGR
    TPC
    STJ

    Missing:
    G-
    ACT
    CCO

    Last edited by 90ToyAllTrac; 09-25-2017 at 06:46 PM.
    69 Mustang coupe 351W edelbrock performer top end, 89 Mustang GT TF top end BBK SSI intake, 90 All Trac JDM 92 swap! "Fiery the angels rose...Deep thunder rolld' around their shores. Indignant, burning with the fires of Orc."


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  2. #2
    Senior Member underscore is a jewel in the rough underscore is a jewel in the rough underscore is a jewel in the rough
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    Default

    Copying my response over from the other thread:

    It looks like the G- moves plugs as well, and TPC just scoots over a few pins. I know a lot of people delete EGR so you should be able to get around that one. The rest I'm not sure what those abbreviations mean.
    1992 GT-S // 1991 GTFour RC // 2007 Jeep Grand Cherokee CRD

  3. #3

    Default

    The ECM that expects EGR will run a lot of timing advance at some part throttle and part load conditions, expecting the inert gas from the EGR to prevent knocking. Without EGR in place, you can get detonation and engine damage.

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  4. #4

    Default

    It's starting to look like I don't need another ECU because JDM ECU did not control the cold start injector which is my problem. Even tho I did find someone with a matching ECU if I need it.
    69 Mustang coupe 351W edelbrock performer top end, 89 Mustang GT TF top end BBK SSI intake, 90 All Trac JDM 92 swap! "Fiery the angels rose...Deep thunder rolld' around their shores. Indignant, burning with the fires of Orc."


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  5. #5

    Default

    Cold start injector is controlled by the temperature-time switch on the water neck.

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