Got an 86 with the 2.5 that is misfiring at idle and hesitating upon acceleration when warm. Upon cold starting, it seems to run fairly smooth for the first minute or two and then starts running worse and if driven, will hesitate when slowly accelerating from a dead stop. Did have a bad TPS when I bought it and threw a code 26 for that, but the sensor has been replaced and there are currently no codes and haven't been for a few months. The car sat for several years and probably had old gas in the tank. If I warm the car up, shut it off and disconnect the O2 sensor, it seems to run smoother when started back up. I took a voltage reading of the O2 sensor (with the lead going to the computer disconnected) and it seemed to stay around 0.9V. Is that normal or could that be causing the problem I'm having? The cts seems to show fairly appropriate resistance values when cold and hot - about 13k cold and a little over 800 when warm. I took videos of the engine starting up when cold, when hot and one of the voltmeter reading at the O2 sensor when warm with the engine idling and above idle. I also have a vacuum gauge hooked up in the videos. Will try to post them or link to them if it would be helpful in diagnosing the problem. Thanks in advance.