I have three mustangs. Two 5.0's and my recently aquired 2.3 (a repo). I decided to try and fix this thing up recently but I hit a snag. To get past the emissions test I have to get my check engine light, which is on because of my TPS, to go off. The problem is, every time I plug in the new TPS, My transmission stops shifting into overdrive. Has anyone had this problem?