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ECU confusion..

Discussion in 'ECU's, Electronics, and Tuning' started by dirt817, Jul 19, 2004.

  1. dirt817

    dirt817 Member

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    I've been bored lately and reading about ecus. I've discovered that there is a difference between the 88-89 pm6 and 90-91 pm6 (the ecu i'm currently using). I have an 89 crx hf with a 91 d16a6 running the stock pm8. I bought a 91 pm6. The ecu doesn't work properly and its either a bad ecu, or something is not compatible.

    Several websites say the 88-89 pm6 does not have an external eprom and the 90-91 does. Would this make any of the internals different and cause the ecu to have different pinouts?

    This is mearly out of curiosity as I'm dropping a z6 in the car eventually and its not a daily driver, I bought it for a build-up.
     
  2. ohmstable

    ohmstable Senior Member

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    Thats right, 88-89 pm6 don't have external roms but 90-91 pm6 do. However the pinouts are identical.
     
  3. hybrid4

    hybrid4 Senior Member

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    They both work, right? If not, what is the diff.?
     
  4. hybrid89

    hybrid89 thistownsucks...

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    88-89 non removable e prom
    90-91 removable e prom
    intentical fuel/timing maps
     
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