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  1. #1
    Fuel Injected! 85Z28NOS's Avatar
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    Jun 2012
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    Ennis, Texas
    Age
    53
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    1226156 to 1226864

    I recently purchased a 84 indy fiero and would like to upgrade the ecm. was wondering if the 85-86 ecm was able to plug in or do I need to change harness also.

  2. #2
    Fuel Injected! 85Z28NOS's Avatar
    Join Date
    Jun 2012
    Location
    Ennis, Texas
    Age
    53
    Posts
    27
    i ordered the service manuals for them so i could compare the pin out on both before i try it. I actually have a 85 wire harness that came extra with the car. If I ever decide to upgrade the engine I will switch it over to a 730 ecm and $88 as others have done. Just not sure about drop in value on this car, or if I should keep original yet.

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