Originally Posted By cnxt
"Best improvement I found in my application was to set the idle AFR very lean. Really cleaned up the exhaust and improved vacuum. Throttle response is great!"

What parameter did you change and what setting did you end up with?
I still have some exhaust smell I'd like to reduce.


I set the idle AFR as high as it would go, 16. I know that sounds lean but that's a tip I picked up on the Chevelle Only web site. Great resource if you haven't visited it. I also adjusted the low RPM setting up 100 RPM to 1200, since my idle is pretty high already and the low RPM AFR setting will start adding fuel. Probably won't be necessary unless your idle is high.


'64 Sport Fury, 528 Hemi, FiTech EFI, 4-speed, 4.10 Dana 60
'57 Belvedere 2dr sedan, current project in process
'19 Cherokee Trail Hawk Elite
'03 Ram 2500 CTD HO, 6-speed 214,000 miles and still going strong