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ls into a 1997 ex coupe

Discussion in 'HYBRID -> EG-EK / DC' started by JDMhatch, May 26, 2004.

  1. JDMhatch

    JDMhatch Junior Member

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    I just recently bought a ls motor with ls transmission and evertything needed for a engine swap except the wiring harness and ecu.. My question is what ecu and wiring harness do i need to purchase for me to swap it into a 1997 ex coupe civic and will i need motor mounts what am i missiing please help THX. :D
     
  2. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    get an OBD-2a LS ECU
    modify your stock harness to fit the engine

    if it is an OBD-2 LS engine you will only need to add lenght to a few wires that dont reach

    if its not an OBD-2 LS engine you will need to either get the OBD-2 components or switch the plugs on your harness
     
  3. JDMhatch

    JDMhatch Junior Member

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    so i can use stock harness? no need for new wiring just get an ecu and ill be good?
     
  4. E_SolSi

    E_SolSi Member of the 20 nut club Moderator VIP

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    like i said you can use the stock harness, but you will need to lengthen a few wires... depending on the OBD of the engine you may need to switch a few plugs

    what year is the engine???
     
  5. smooth_criminal

    smooth_criminal Senior Member

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    OBD2 ecu plug:
    http://www.ff-squad.com/tech/wiring/obd2.pin_removal_1.jpg

    As for wiring harness go, reusing your existing civic harness on the LS motor, will work just fine. You'll just have to perform the IACV fix and CKF fix. This is all explained in this diagram of mine:
    http://www.ff-squad.com/tech/wiring/wiring.96-98.jpg

    ...and here's an additional diagram for the ecu pinout swap for the IACV:
    http://www.ff-squad.com/tech/wiring/wiring.96-98_a-plug.jpg


    heres some info on what you will need to rewire, Becaue it is not a direct plug and play. well not for my Lx, your EX harness might already have the correction on it. I'm about to do the same swap. in my 96 LX , I got a 99 LS motor and a 00 GSR tranny.

    info that i posted as well as the site is from Katman
     
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