Can I just hit disable? The reason I ask is, I've got a Silverado that has an evap leak at the canister, I assume this is what's throwing off the VFF calculations causing the truck to think it has 44% ethanol in the fuel content raising stoich to 12.18 in CL. I'm just wanting some input from some of you who may have ran across this type situation before & if what I'm wanting to do will even work. Also do we have the ability with the scanner to do a fuel density reset?