My Cadillac has been to the dealership and to transmission specialist and both say they don't know what's wrong. No codes besides the security light on the dash that comes on every now and then. I can't accelerate around a bend at all. I changed the spark plugs ,fuel filter ,air element is dirty little. I checked my fuel pressure at the schroeder valve and that seems to be fine. I been reading the chilton Manuel that I have and still don't know. I was thinking maybe the catalytic converter maybe?? Or maybe the spark plug wires??