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I am also having trouble picturing where I could have gone wrong in the wiring. It seems unlikely to me that I could have grounded all 4 of the injector leads. Your idea about testing with the main connector unplugged is a good place to start. But assuming that checks out OK (no ground with the connector unplugged), I really would have no idea what to do next. I can’t believe that I would put all 4 injector leads in the wrong hole. BTW, I did not install an injector disable switch.

Hi David,

Ed's message is great, and I won't try to add much to it.

I did just take a look at the EC-2 plug again, and noticed that the primary injector wires are pins 17 and 18, with a ground on 19. The secondary wires are pins 35 and 36, with the ground on 37. These are supposed to be larger wire than the rest, so they don't fit as well in the plug. All it would take is a strand of wire between 18 and 19, or between 36 and 37 to cause one injector to open up when you apply power. I'm betting you'll find your problem in the connector. Of course it also wouldn't be too hard to accidentally swap one of the injector wires with one of the grounds, which might do it too. Naturally, I would never make such a mistake (ahem...) :-)

Good luck,

Rusty (off to TIG some stainless)