I have gotten a Toyota 22R to stumble along for about a half hour 6-7 years ago. I was using 4 of the Ozzy Freedom cells with four electrodes instead of 2 in each. Lye for electrolyte. Had a 10amp fuse on the cells. Started on gasoline then turned off the fuel pump. Was bubbling air through the cells and feeding into the intake through a vacuum port. I was expecting to retard the timing as the gasoline ran out but ended up advancing to 25degrees BTDC for the best stumble. The experiment ended when the electrodes melted!!
Its gonna be about a month before I get back to it but am going to attempt to run a propane camp stove next so I can actually observe the flame.