Pshhht... easy to find. Load yourself and Dave up and come down my way for a weekend. I can overwhelm you with parts in the you pull it's. Ask Jcassity about my honey holes. Wow, that sounded bad...
Hey OP, had the same problem with my 88 tc. Guess what??? A tps probably won't fix it.... Throw one on it tho. The parts stores love people who troubleshoot by changing parts willy nilly.
Check out the new fusions. The interiors are cavernous. The cars are fairly quick with the 2.0 ecoboost and awd is an option. Sadly, there is no longer a manual transmission option available. 2014 was the last year for the stick. My wife has a 14 fusion se sport 1.6 ecoboost and 6 speed manual. Extremely fun car to make the daily commute.
All signs lead to water pump. I had a similar situation in a 99 expedition 5.4 liter. No heat, everything cool/cold to the touch, no overheating. After many flushes, including the heater cores (rear heat on this one) there was little to no coolant flow. Pulled the water pump and there were no fins left at all. Ironically, when you'd take the engine over 3500 rpm the heat at the vent would crest over 65 degrees. Replaced pump, topped off coolant, heat output at the vent jumped to borderline uncomfortably hot. Problem solved after an afternoon of frustration.
Let's put this in perspective. I just sold an 87 xr7, no cancer, no dents, low miles under 85k, perfect leather interior, uncracked dash, everything working including freshly retrofitted ac. $2300 took it home to the new owner.
