no actually I used no relay to test this. I found the injector harness ground, cut it, and wired in a normally closed switch, so when I pressed the button it killed the injector's ground. Again the car doesnt quite die but it chokes bad @ idle, so it's pretty much instant no fuel. I do not have electronics hooked up to an injector yet so I cant tell you how much juice is going thru, as stated before I might have a second ground, or the actual wires might be their own ground, like the current could be shorting on a 5v lead from a 12v power. Ive never really messed with these things before. I do notice that I'm P&G much more just to be able to use my toy, so the placebo effect and further practice might be much more effective than the button.
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