[Bearleener]

I kill the engine by momentarily interrupting the signal from the Hall transducer on the distributor. The ECU uses this signal to know what the engine speed is and when cylinder #1 is at top dead center, for timing the injector pulses; with no signal the ECU thinks the engine's not running and stops injecting. On my car the signal is on a yellow-and-green wire accessible in the engine bay on the firewall. I installed the stop button above the ashtray on the center console, next to my start button, which runs the starter if I can't bump start (see photo in my car's garage). I do have to keep the stop button pushed for about 1 second until the engine's really stopped to prevent it starting itself up again; I could probably rig a capacitor arrangement or so to hold it open automatically.