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Old 08-08-2011, 02:12 AM   #3 (permalink)
Cyborg ECU
California98Civic's Avatar
Join Date: Mar 2011
Location: Coastal Southern California
Posts: 6,299

Black and Green - '98 Honda Civic DX Coupe
Team Honda
90 day: 66.42 mpg (US)

Black and Red - '00 Nashbar Custom built eBike
90 day: 3671.43 mpg (US)
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For the FI kill-switch build, a friend convinced me of the value of this design for a fifth generation civic, which interrupts the ground to the injector relay. THE ADVANTAGE of this design is that there will not be a large electrical current running through the switch and its leads, which run along the metal shifter rod.

NOTE: For the sixth generation civics (1996-2000) the fuel injector relay was moved to the passenger side dash, behind the glove box, beside the door. In the fifth generation civics (92-95) this relay was beside the fuse box under the dash on the driver's side. It is harder to get at in the sixth gen arrangement. Here's a pic of the FI-relay as installed behind the glovebox:

Here is what you need for this kill switch:

1 - A non-lighting interrupter switch (push to break the circuit).
2 - 5+ feet of 18 gauge wire (black preferably).
3 - At least four butt-splice fittings.
4 - An OEM Sixth Gen auto trans gear selector.
5 - TOOLS: phillips head screw driver, wire clippers, 10mm socket.

Here is the basics of what you do (see pics):

1 - Remove the glove box
2 - Identify the injector relay
3 - Remove side panel to get at 10mm bolt securing relay
4 - Cut back conduit and clip black ground wire one inch from plug
5 - Strip ground wires both ends and attach butt-splices
6 - Attach your wire to the splices to make a long ground wire extension.
7 - Attach wires to switch (we had to solder, but you may find easier switches) and insert wires and switch into shifter knob.
8 - Securely mount the shifter knob to the shifter, wires running on the inside, down the shifter and under the pleather decorative thing.
9 - Attach switch wires to extended ground wires using a second pair of butt-splicers.

PS: in the final install, I went with a black button. Stealthier. That's why the color changes in the pics.

PPS: Special thanks to my friend BG.

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See my car's mod & maintenance thread and my electric bicycle's thread for ongoing projects. I will rebuild Black and Green over decades as parts die, until it becomes a different car of roughly the same shape and color. My minimum fuel economy goal is 55 mpg while averaging posted speed limits. I generally top 60 mpg. See also my Honda manual transmission specs thread.

Last edited by California98Civic; 12-06-2011 at 12:00 AM..
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