You need the volt to tell the comp todo compensation. Not the OHM. When you push down the AFM plate down the volt go up evenly. The afm is ok. Do not need to change. 1.4v will give you rougn idle. My 87 16v engine cuts out and intermittent idle surge when stop or try to parking. I adj from 1.35v down to .8v. Run just like new. Give it a try. My wife 85 8v have 320000km same afm. Run better than my. So some time change things is not go by how old or miles.