theres a gra[h stu put up ages ago
basically the leaner the car goes the more power it makes to a point then it goes back to loosing power but the car would melt before then
thats why people say there car was running soo well before it melted,, the heat from it being lean acts alittle like a advance and the cylinders keep the engine going quick until,,,, well black smoke and missfire on number 3
if you drive on and off the gas running it any leaner will be stupid