well i was ready to order plugs, wires and a fuel filter.... but i've been watching my rpms a lot more closely since christmas. i drive a half hour to work and all of the roads are 45 mph speed limit. anywho, at 45-47 mph my rpms are right on 2k. my torque converter used to lock up and my rpms dropped down to just above 1k. ive been watching for the past days and i never saw my rpms drop when on a striaght, level road at a constant speed around 46 mph. Could my torque converter be acting up/not engaging causing my horrendous gas milage?