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Lee I would bleed it again. Also after running it, pull the cap and the level should have gone down some if there is any air in the system.
If the level is too low, the heads will be "dry" the heat will blow cold and the temp sender could read high because the heads would not be cooling off.....but that's speculation the sender might not read very well off air alone so it might actually read low or zero with no coolant on it.
Did you scan it and see a difference between the gauge and the PCM reported temp?
No chance to scan it yet... I will this evening though. I'm going to move one bundle of wires on the passenger side and then spend the rest of the night (if I can) working on this coolant thing. I'm afraid to run the car long enough to get good and hot for fear of burning those wires...
I'm leaning toward air pockets I just wanted to get other ideas as well if there were any.
I had the same problem with a ****ty pep boys sensor.. turned out the sensor was just 30 degrees off or something. I drove around for a while with a scanner hooked up to monitor the temp of the car. Maybe just get a sensor from the dealer. I ended up just putting in an auto meter gauge.