Kill switch how-to

[lightblaze]

Originally Posted by Clev

Oh, excellent idea! Does doing this trigger the Check Engine light?

Based on the thread, I decided to wire my relay switch to the cam sensor. I have a '97 Geo Metro. It was quite easy actually. I thought it was so easy I must doing something wrong. Here's what I did.

I found the cam sensor wires by locating them at base of the distributor box. Mine had a white and black (if I remember right). I carefully removed the black protective casing and spliced the white wire carefully and tied the two open ends to two 18 gauge wires that I simply connected to a 12v, 20 amp black rocket (?) switch (less than $5) on my dash. It works fine and I haven't yet seen the check engine light come on. I used wire connectors and black electrical tape.

[cassey37]

I drive an automatic and I noticed today that DFCO doesn't kick in unless I am going 45+ mph. Thinking about that, on an automatic, the torque converter has to be locked or the engine will die. Keep the safety in mind with any mods - would hate to loose power steering/brakes at "just the wrong time".

[steffen707]

Originally Posted by dcb

That's a nice writeup bbjsw10,

I had an injector kill switch on a metro, problem was it wouldn't shut off cleanly. I switched to the camshaft pickup trick (disables ignition) and it is a much cleaner transition to off and restarting, and maybe I can reuse that fuel on relight . You could kill both too with the right combination of relays, that would be more like what happens when the key is turned off.

If the ignition switch is left alone and while driving you just cut spark to the spark plugs, will the injectors keep firing and dump fuel into the intake?

If they do, that can become really bad for the oil and gas mileage. lol