I took a long drive playing with the settings on my %#@$%^^ Fast efi. I knew it was looking for more gas at idle with the IAC count rising after idling for a while and if I did not feather the pedal it would stall. I know it was looking for fuel but I had the A/F setting at 13.5:1 at idle so it should have had plenty of fuel. The A/F readings on the Fast don't really help much cause it doesn't change to mirror with any changes made to the A/F targets. I set the idle A/F to 13:1 and that should give me the smell of running rich like it would with the quadrajet I build. Well to my surprise it is not running rich and running better than it ever has so with system I have to forget about setting this system up using any knowledge I have regarding A/F settings randomly pick settings....