I have a 93 k1500, 5.7, 7427 running $E6. I have yet to touch my timing tables and probably wont until all the parts swap onto it in a couple weeks. However, one of the things Ive noticed is that when datalogging my spark advance at idle is not what is commanded in my table. Around 20 is commanded, but Im only getting around 15. If I tap the gas a bit it will go to 20, but at idle its about always lower 5* or so. I have looked at all the biases (I think) and I cant seem to find anything. Is this normal behavior for it to be consistently lower, or higher for that matter? Just trying to wrap my head around it all.SparkPhoto.PNG Im using advanced $E6 v250 xdf and modified A201 adx.