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Wiring Ecu

Discussion in 'ECU's, Electronics, and Tuning' started by civic_01, Jun 16, 2003.

  1. civic_01

    civic_01 Junior Member

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    :spin: hello guys im having trouble putting an ecu from 99-00 civic si into a 91 civic
    hatchback std :ph34r:
     
  2. Gen2Teg

    Gen2Teg Senior Member

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    yea you are. in fact, its impossible unless you do a shit load of wiring. Your car is OBD 0, and the ECU you're trying to use is OBD 2. Why would you wanna use that ECU anyways??? I don't even know if they do make jumpers for OBD 0 to 2, or even 1. im not saying that they don't, but im just not sure.
     
  3. AllMotorMonster

    AllMotorMonster Senior Member

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    Inland Empire foo!
    There is no benefit to even attempt to wire OBD2 into a OBD0 car. In fact, it's a huge waste of time and money.

    But, if you really want to do this, you'll need to buy a OBD2 (99-00) Civic Si HELMS manual, and a 88-91 (your car here) HELMS manual and match the wiring up.

    I know for a fact, you'll need to add the following wire(s):

    Extra 02 sensor wires (primary and secondary)
    Knock Sensor
    Vtec Pressure Switch
    Vtec Solenoid
    Crank Fluctuation Sensor
    Distributor
    MIL (Check Engine Light on Dash)
    OBD2 Diagnostic Port
    OBD2 Self Diag port (2 wires)
    Vehicle Speed Sensor

    Good luck with your endevour
     
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