Thanks bbjsw10 for your pictures and excellent tutorial. I tried to make an injector cut off using a relay across where the FI (fuel injector) fuse was, like you showed. But the FI fuse on my 2000 Metro also supplies power to the "Main Relay" so my ScanGage would die after a few seconds.
Inline with the wires going to the actual injector is a big resister in a heat sink. I put the same relay inline there, so that only the injector is cut off when I press the switch. This allows my ScanGage to show 0 GPH and 9999 MPG. A bump start gets everything going again.
I put my switch positioned very similar to your way, except I moved it off to the side of the gear shift so my thumb pushes it. Thanks for that tip.
I believe EOC to be the best ecomod I have done to my Metro.
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