I just completed the ECU mod, unplugged the air pump, plugged up the vacuum tree and get 410 immediately after engine start. So I checked the resistance at the solenoid and it is 0, nada, zilch. I guess that was my primary problem as the 410 is a code that wasn't present when I bought this junker.
I really don't like to cut wires, but if I put a 33ohm resistor between the 2 wires that go to the solenoid, will that fix me up? My soldering skills are shy of 'novice' and I just hope I didn't cook the the diode between pins 32&37.