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Thread: ECU Move to interior

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    Post ECU Move to interior

    This thread is a how to on moving your ECU from your engine bay to the interior of your car.

    Necessary tools:
    13mm socket
    10mm socket
    7mm socket
    Socket wrench
    Knife or scissors

    1. Disconnect negative side of battery.


    2. Take the mount off the strut tower using the 13mm socket and the two connectors holding the wiring to the firewall using the 10mm socket. Replace strut tower bolt.


    3. Disconnect the wiring from the ECU. There is a grey clip on each connector that has to be pushed back in order for them to release.


    4. From the inside of the car locate the large grey grommet in the firewall, once located look through engine bay and find the same grommet.



    5. From drivers side interior of vehicle reach up and pull the grommet out of the firewall. Push both connectors through the hole you have opened up in the firewall. You will have to start the wiring from the engine bay and go back to the interior of the car to finish pulling it through.


    6. Using knife or scissors cut a hole in the grey grommet large enough to put the connectors through and push them through.

    7. Push grommet back into position in firewall making sure it is fully seated back into its' original position. Pull all slack in the ECU wiring through firewall making sure to check inside of engine bay to verify it has not become tangled with any other components.


    8. Using 7mm socket take off the four (4) screws that hold the plastic covering in front of center console off. There are two on each side. Carefully pop the clips in the center apart making sure not to break them so that you can fully access this area. Route ECU wiring to this area (There is a clip you unscrew and put the wiring into near the OBD 2 port).


    9. Pull the heat piping from this area to make installation easier.


    10. From the passenger side slide the ECU into this area with the connectors towards the rear of the vehicle. (DO THIS FROM PASSENGER SIDE, it will save you a ton of time in fighting to get it in.) Reconnect the wiring to ECU (blue to blue, grey to grey). Make sure you push the grey clips back in place to secure wiring to ECU.


    11. Reconnect battery and start your car to ensure connections have been made.

    12. Again using the 7mm socket put the covers back over that area making sure to reconnect center clips.


    13. Go grab a beer because the ECU isn't stupidly positioned anymore.


    If you have any questions feel free to hit me up.

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    Old Dirty Dog Member Array J-Daddy's Avatar
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    Re: ECU Move to interior

    Props friend! Good write-up.

    Sent from my T-Mobile G1 using Tapatalk

    LE5 Intake manifold, AEM cold air/filter, LSJ injectors, Header back 2.5" exhaust, Racetronix FP, and of course - HP Tuned.

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    Nice how-to!

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    Thanks hopefully now the "other forums" will have a link to this one since this is the only how to on this with step by step pics lol.

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    Nice write up.. but I think GM took care of this for me lol.

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    Sorry my pics are so small I will get a new set in my album here shortly in the meantime here is a link to see the full size pics of the process. http://picasaweb.google.com/11712019...720?feat=email

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    Used this write up to relocate my ECU! It was a big help, thanks!
    http://www.ecotecforum.com/forums/image.php?type=sigpic&userid=1037&dateline=1180516081

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    great write up! just stumbled across it and decided to do mine. looks great! took out the non functioning cruise module while i was at it lol.

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    I was so close to doing this on the 4th when i did my build, but hey it was the 4th gotta party

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    Do it.....it looks so much better without it under the hood.

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    i prolly am this weekend when i do my IC piping

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