We have made a revision to the AT-110 and AT-120 installation manual. There was some confusion in regards to where sensor 1 on the Auto Tune module was to be loacted. Make sure sensor 1 on the Auto Tune module is installed in the front cylinder head pipe.
You can download the new manual here. http://www.dynojet.com/newdynojet/downloads/Default.aspx?ProdType=Power%20Vision