I find a common agreeance to set the idle external load table using data gathered from logging zero pedal torque. I set up a table on the scanner to match the idle external load table, but being a truck I have no engine oil temperature sensor. The scanner just shows -40 the entire time. So I figure the ECM is just using that first column being -40, but I see many modified truck tunes that are setup as if the entire table is being used. So this makes me wonder if it is actually using calculated engine oil temp or something other than the -40 reading?
super cold start and drive from work.hpl
idle tweaks two.hpt