[dcb]

" Did I just not give the injectors enough time to fully shut off"
It happens to me a couple times a day. I just figure I didn't give the engine enough time to come to a stop, in my rush to get the speed signal back. With the kill switch I can hold it in longer and make sure the engine stopped and not lose distance tracking.


"Is there a definitive conclusion"
I don't think so. I put the switch in series with an "FI" fuse in the saturn and in series with the cam sensor on a metro. I lean towards shutting off both ignition and fuel if possible (I believe the cam sensor interrupt does that on a metro), but just shutting off ignition will give a smoother shutdown than just shutting off the fuel injectors, as shutting off fuel while leaving ignition on makes the engine stumble on the fuel coating the manifold, and will result in more inadvertent relights.