Great video. Just a guess from an old drag racer but could it be because you have a constant syn gas pressure but the throttle opening leans you out and as you slow it builds up more syn gas volume and that makes you run rich? New to this but it is fascinating. I am now a subsciber.
Fred, I installed a wide band O2 sensor and the display to monitor the ratio. I use a throttle body for the mixing valve that has a cable attached with a T handle lever on the console.
