1.5T Guide to DIY Flex Fuel Kit for Hondata or KTuner

  1. dc2turbo

    dc2turbo Senior Member

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    #1 dc2turbo, Nov 22, 2017
    Last edited: Dec 10, 2017
    Parts List:
    1. Wires ( http://a.co/euZScYw )
    2. Shrink tubes ( http://a.co/gC0W2E5 )
    3. Add a circuit fuse ( http://a.co/9fjOJx3 )
    4. Wire sleeve or loom ( http://a.co/iI1DTnO )
    4. Fuel fittings/lines ( see below for options )
    5. Plug for ECT2 ( optional - http://www.cycleterminal.com/hx-series.html - 2 pin HX .040 Male Connector)
    6. Flex fuel sensor/ Kit ( see below for options )
    7. Fuel clamps for the fuel line if you use OEM line ( local car parts store)

    Fuel line options:
    1. Modifying the OEM fuel line with Dorman fitting ( http://a.co/imEgKZa )

    2. AN Fuel line
    2 x Russell 641303 -6AN Male to 1/4" SAE Quick Disconnect Female Push-On Fitting ( http://a.co/4BBXuHa )
    2 x Russell 644123 -6AN Male to 3/8" SAE Quick EFI Adapter Fitting ( http://a.co/ao5CfNI )
    3 x Russell 610025 Black -6AN Full Flow Hose End ( http://a.co/0bONiI5 )
    1 x Russell 610165 Black Full Flow 90 degree Hose End ( http://a.co/9DynGVF )
    1 x Russell 632053 Black ProClassic Hose 3ft ( http://a.co/b2H7tse )

    Fuel Fuel Sensor / Kit:

    1. KTuner converter box $99 + GM flex fuel sensor with pigtail $80-100?? ( I'm not sure which GM flex fuel sensor would work. Hopefully someone can comment on this. Also if someone has a link to it) ( http://prlmotorsports.com/ktunerflexfuelconverter.aspx#.Wi1kEkqnH0w )

    2. Innovate Motorsports 3904 MTX-D $210 ( http://a.co/bruW8N8 )

    3. Zeitronix ECA-2 $299 ( http://www.zeitronix.com/order/order.htm )

    I'm personally running a Zeitronix ECA-2, So some things might be different depending which kit you get. The power and ground should be the same on any kit (red/black).
    Zeithronix output wire color is white/blue
    KTuner output wire color is yellow


    1. Remove OEM fuel line.
    Remove the Clip from the connector
    upload_2017-11-22_16-30-24.png
    Push the green clips in and pull on the line to remove it off the fuel line.
    upload_2017-11-22_16-32-59.png
    Do the same on the other end of the line by the intake manifold
    upload_2017-11-22_16-33-49.png

    2. Cut the fuel line, insert the fuel clamps and add the Dorman fittings. Use a heat gun to heat up the hose to easily slide over the Dormans fitting. You can also put the fuel line ends in boiling water for a few mins to soften them up. Tighten up the clamps after properly sliding the hose all the way.
    unnamed (2).jpg
    unnamed.jpg

    3. Reinstall the fuel line
    unnamed (1).jpg

    4. Make your harness
    Zeitronix ECA-2 came with most of the harness needed. Just have to extend the power, ground and ethanol output wire.
    upload_2017-11-22_16-44-35.png
    The length of the wire depends on where you are placing your ethanol converter unit at. I placed my by the fuse box.
    Here you can add your add a circuit fuse into the harness power wire (red), add a ring terminal for the ground. and add your output wire (10-12ft).
    I used a quick connected on the output wire. This will allow me to remove the unit if needed. I can just cut the shrink tube and not the wire.
    I sleeved all the wires and shrink tubed them too.
    upload_2017-11-22_16-47-51.png



    Running your wires to the engine bay

    You will need to depin the plug for the flex fuel sensor. Looking at the front, you will see a purple cover. Use a small flat head and pop it off from each side.
    upload_2017-11-22_17-9-59.png

    Pull the wires out and slice the shrink tube. Remove the wire loom

    upload_2017-11-22_17-10-26.png

    Get a coat hanger and tape the wire to one end. put some soapy water on the tape. So you can easily slide it pass the gourment



    Insert the coat hanger into this gourmet where the hood release cable is going through. You will need to do this to all 3 wires and the ethanol output wire


    upload_2017-11-22_17-8-17.png

    upload_2017-11-22_18-10-44.png

    Pull the wire up from here. After you get all 3 wires through, put the biggest shrink tube over the 3 wires. Then put the pins back into the plug.
    upload_2017-11-22_17-33-10.png

    After you fed the output wire into the engine bay. You can add the plug to the wire but make sure you have enough wire to each to the ECT2 plug.
    This is what you need to do to make the plug fit.
    Shave the ribs off from the center and top. Use a sharp knife and slice them off slowly

    upload_2017-11-22_17-3-26.png
    upload_2017-11-22_16-57-5.png

    Crimp your wire to the pin it comes with. Insert it to the right side if you are looking at it from the back side.
    upload_2017-11-22_16-56-22.png


    Route your wire however you want. I routed my with the flex fuel sensor harness by the firewall then went to the front by the radiator .


    You will need to jack the car up and place the front on jack stands. Take the under tray off and the ECT2 plug will be on the passenger side radiator by the lower radiator hose.


    upload_2017-11-22_17-36-2.png

    Unplug the blue ECT2 plug and plug the ethanol output plug into it.

    upload_2017-11-22_17-36-40.png




    After you have the ECT2 and flex sensor plugged in. Grab the wire loom that you took off earlier. Reloom the harness back into it. I ran my output into the loom too. That shrink tube we placed on the harness earlier. You can use that on where we spliced the original one earlier. You can zip tie the loom onto the plastic caps .

    upload_2017-11-22_17-46-33.png

    Time to go back into the car to connect the power and ground.

    I used the add a circuit on an empty fuse slot. Make sure it's on that slot in the picture. It's an accessory power slot. So it will get power only when the car is on. If the add a circuit feels loose, you can bent the pins the opposite direction to make it a tighter fit.

    upload_2017-11-22_17-49-56.png





    I used the hood latch bracket nut to ground my unit.
    upload_2017-11-22_17-54-27.png


    All Done! Now enable flex fuel on your software and disable ECT2 and code p0128.

    If you didnt buy the plug for ECT2. You have 2 options 1) splice into the red wire on the ect2 plug 2) splice into the ecu pin e54 for ECT2

    If you are using KTuner converter,you can leave your converter in the engine bay. You only need to run the power wire to the inside fuse box. If you're willing to cut your fuse box in the engine bay. You can also tap your power from there.

    For KTuner users, you will need to use the KTuner converter and not the other 2 listed.

    If I missed something , please let me know
    Some of the photos are from Hondata.

     
    SlowestCivic, AhmedTitef, MGZ and 11 others thanked this.
  2. JDM_DOHC_SiR

    JDM_DOHC_SiR Uncle Dave

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    Thanks for taking the time out to do this:thumbsup: I'm sure this will be great for those people looking to save some $$$ and also installing either kit with different options for plug and play:)
     
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  3. OP
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    dc2turbo

    dc2turbo Senior Member

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    It's a good bit of saving. up to $300 depending what you have already and what kit you go with
     
  4. maddmatt02

    maddmatt02 Senior Member

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    Had all my parts ready to go, or so I thought. After seeing you buy a new plug I decided I didn't really want to splice and wanted it to look/be a better install so now I am waiting on some loom (small braided like O2 harness loom, not plastic) and I went a different way and bought a pack of pins from McM-Carr but I still don't know if they are right til I get them, I just plan on re-pinning the stock plug and taping the old pins out of the way for possible future reinstall...
     
  5. CivicXander

    CivicXander Senior Member

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    I'm attempting to make this right now, so far I've spent about 150 and I think I've got all I need at this point. This is a huge savings!
     
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  6. OP
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    dc2turbo

    dc2turbo Senior Member

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    If you get the plug that I got, it comes with new pins for the plug.

    You could also get the ecu pins too. Depin the ECT2 one out and add your output wire with a ecu pin at the end to the plug
     
  7. maddmatt02

    maddmatt02 Senior Member

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    what sensor did you get? I am going with a continental branded sensor for a GM vehicle, after that, pigtail, converter, fuel line fittings I am at 171 shipped plus I forgot what I spent on loom and pins.

    That's what I did, instead of a whole new plug I just bought pins that I HOPE were the right ones to fit into the factory plug so I can re-pin it with the signal wire from the converter
     
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  8. CivicXander

    CivicXander Senior Member

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    I just bought this one https://www.ebay.com/itm/192099093454
    it looks just like the one sold from Vittuned
     
  9. JDM_DOHC_SiR

    JDM_DOHC_SiR Uncle Dave

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    Let us know how that sensor work out for you...:hmm:o_O
    I found the GM 13577379 has the best track record for being reliable :thumbsup:
     
  10. CivicXander

    CivicXander Senior Member

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    I guess the question is how accurate the part would be? not sure how to test it, except maybe install it, pump pure e85 and hope the ktuner reads 85%?
     
  11. OP
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    dc2turbo

    dc2turbo Senior Member

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    The best thing to do is to ask @KTuner on which GM sensor he recommends
     
  12. maddmatt02

    maddmatt02 Senior Member

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    Nope, e85 could be like 71-90 or so I thought but recently heard in AZ 51% would qualify. No idea how true that is but you can buy a tester for like 10 bucks or make one. All it is, is a bottle with a line you fill with water to, fill the rest with fuel and shake it. The water mixes with the ethanol and the gasoline floats and the lines are labeled so you know the % by where the speration occurs.
     
  13. KTuner

    KTuner Senior Member
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    This is one of the most common, but even these get knocked off with cheaper ones that fail. Make sure you get it from a reputable source.
     
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  14. JDM_DOHC_SiR

    JDM_DOHC_SiR Uncle Dave

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    So I have heard ;)
    Ordered one from Summit racing ...lets hope they send a legit one :hmm::thumbsup:
     
  15. hawk02

    hawk02 Senior Member

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    Well done
     
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