[inkboy]

I can answer my own question now. I fixed it with a new $14 Engine Coolant Sensor. Took about 5 minutes. The old one had a plastic tip that was cracked. New one has brass tip. Now my car purrs again, and no starting problems, and the temp gauge works. I guess the on-board computer thought the engine was always cold, so it flooded on warm start. I guess the radiator fan never came on, either, and the temp gauge never showed any temp fluctuations. Now that's all fixed. Just in case, I also installed a new Throttle Position Sensor and cleaned out all the carbon gunk from inside the throttle body. Anyway, it runs great again.