Reconnect the wires to the new gas valve.
Make a soap and water mix with dish soap and water, turn the gas on, test every pipe joint by putting soapy water on them, if there is a leak, it will make bubbles.
Now you are ready to light the pilot, turn the knob on the gas control valve to the pilot position, push it in, lite the pilot, hold for 30 seconds, let button go, if pilot stays lit, turn the gas control knob to the on position, turn the power back on.
This is where you need to use a water column gauge to adjust the gas valve.
Once that is done you are good to go,
Retest for Carbon Monoxide.
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