[mark houghton]

So I took the time to re-read all your posts. More and more points to a problem with the fuel distributor, gas leaking past the control rods and into the ports when it shouldn't be, independent of the position of the metering arm. Maybe a worse case scenario but seems you almost ruled out everything else.
What we know is this: system and control pressures are good, air plate appears properly adjusted, CSV valve taken out of the equation, yet still gas flows through the injectors without the engine running...and even when running its way too much and you're unable to lean it out.
Ugghh...looking to the brain trust on here to jump in.