Hello Mr. Pete ,
Last night on the hangout you were asking why I usually start up on gasoline and then switch over to wood.
Usually when the hot gasifier is shut down there is enough pressure in the system to push the wood gas up through the delivery pipes , into the mixing area and fill the fresh air inlets. This will cause a very rich state and will depend on how long the truck has set before restarting . The woodgas is potent but I have to hunt for the proper ratio. Therefore when restating I usually will kill the delivery pipes with the fresh air valves open, turn on the gasoline crank the motor and the computer will find the correct ratio almost immediately , then I switch to wood .
Below is a very short video I made this evening showing hunting the correct A/F ratio . I assume it is in a flooded state when I start the search. Again no gasoline wood only.
Also I make a habit of always turning the ignition switch on and off before cracking so the computer will adjust if I previously shut the motor down on woodgas. In the video I forgot to do so and you can hear the kickback of the starter.