I have an 87 7mgte supra. The previous owner installed an old school AFC with the single knob. He had an exhaust gas temp gauge but I recently installed a wideband something I understand a little better. Now I'm having a weird intermittent problem with my fuel ratios. Sometimes it runs 14.7 at idle and cruise and I can adjust the single knob afc and make it really lean or really rich if I want. Then other times the car will not go leaner then 14. I can turn the knob all the way to full lean which is -10 on the AFC and it will not go past 14.0 at idle.
Does anyone have an idea on what I should do or where to start?
Does anyone have an idea on what I should do or where to start?