Injectors

I replaced an injector on my pickup because it was stuck open. All others were good, now when I turn my key to on position the injector next to it sprays fuel. Checked regulator it is okay. Can anyone tell me why this would happen? Hitachi injectors are very expensive. I am sure the fuel line is installed properly it has been sitting one year. Would it do this if the wire connectors were not on the injectors correctly? If the wrong cap was on the wrong injector? The wires are all a certain length so it is hard to mismatch them I think. Also, are these injector wires color coded? They all seem to have a two color striped wire and then a solid black wire.

After putting the engine back into the truck after being rebuilt I forgot to install the ground strap and also the new battery cable was not grounded to engine either. After grounding it seem to stop spraying the gas. I am not sure if that was the problem or not but it is not doing it anymore. But it is surging at about 2,000 RPM engine goes up and down in RPM and strong smell of raw gas. Any thoughts?

I put new plugs in the truck today started it and ran for five minutes. Still surges at 1,500 rpm. Pulled the plugs and every last one is completely black. Is this this a sign of oil or gas? Plugs are dry. And the black soot wipes right off. What could be causing this? I noticed that number two plug was not quite as bad as 1.3.4. I would love to hear your input.

Thanks Fellows, JC