after driving around in town for awhile the temp gauge in the dash will go all the way up and straight back down to normal temp all within 3 seconds. Car hesitates during these 3 seconds

Asked by Mar 14, 2015 at 02:42 AM about the 2000 Mercury Grand Marquis LS

Question type: Maintenance & Repair

1 Answer

Update: I have replaced the coolant temp sensor and thermostat. This helped for 3 nights then it started up again. It happens maybe once an hour or so.

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