Try an inexpensive thermostat, Check that the fusible links are not fried, clean the battery cable connections, test battery. As for the idle, I seen people turn it up to get a better start when selling it. It could be a lot of things. Try turning the idle screw by the throttle body clockwise till you get 700 rpm on a warm engine. Then test starting it cold and hot.
If you dont have correct fusible link, its a problem. They are available. Thats one. I dont think I described the location of the one idle adjust screw. Its located behind the rubber boot after the air flow meter. Its sticking up with a spring under it. should turn with fingers. adjust to 700 rpm while engine running at operating temp
Thats a good answer. I have a spare TPS. Could be something stuck in the throttle body, not letting the flap close. Air flow meter flaps. flaps.
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