Fuel Injector Kill Switch: 1990 Honda CRX HF (How To W/ Pics)

[jasonst]

I'm not the "How To Guy" or anything, but hopefully this will be of help.

Purpose: A switch to immediately kill the injectors while keeping lights, signals and instrumentation.

Decide where you want to place your switch.

I wanted mine to be super accessible, but not super noticeable. I wanted it close to my right hand and close to the shifter, but I didn't want to cut a hole in something important. I preferred it be on something I could easily replace if I botched it.

I chose the small access cover under the emergency brake lever:


Once you've chosen the perfect spot it's time to move on to the PCM-FI Relay.

Remove panel under steering wheel to open up the area a bit:


Here's a good link showing how to gain access to and remove the PCM-FI Relay:
PGM-FI Main Relay problems and fixes

This is what you're looking for:


After talking with several people I decided to wire my switch into the ground wire of the PCM-FI Relay. I absolutely hated cutting into the wiring harness, but I couldn't think of a way to avoid this.








Put the PCM-FI Relay back where you got it, (no swearing allowed) along with the hood release and button up the dash.

Here's where the wires come out under the emergency brake lever:


I wanted the switch on my side of the emergency brake lever:




I'll update this thread with my thoughts after I've driven for a few days.

[FXSTi]

Jason,

Nice how to. Is that a momentary interrupt switch or an on off?

I keep wondering how long it will be before I cut into my 2011 Fiesta. Someone smarter than me will have to figure out what wire to cut and where.

Kirk

[jasonst]

On/Off

[California98Civic]

Nicely done. Looks good. Stealthy.

[IsaacMTSU]

How do you like the switch? I have the usual bad relay problems, sometimes it just wont click and I can't restart. I guess this kills the whole relay and I would need a good one for this to work?