with the stealthram afpr, how sensitive is it when you adjust the screw? on the dyno i was running about 11.2:1 afr. and the screw was about 2 full turns out from being all the way in. so ive backed the screw out about halfway and now the car barely starts when its cold.. but im sure thats an ecm issue, anyways by changing it that much, did i change the afr much you think?