What is your question?
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What is your question?
I'll be driving along and my tempature gauge goes from normal and shoots up to hot and my check engine light goes on. By the time I try to pull off it goes back to normal. The coolant level is fine and I have already replaced the thermostat and the water pump. Anybody know what else it could be?
3 Replies
Once the Check Engine light comes on the fault code is stored in the computer and will stay there even if the light has gone back out. Use a scan tool to to retrieve the stored code, the code will indicate where the fault is . Not sure if Ford use the same sensor to report coolant temperature to the computer and temperature gauge but it could be a bad coolant temperature sensor.
Like Patrick stated, it could be a bad temperature sender...you really need to determine if the engine is actually that hot. If you turn the heat on and blow it full blast, does the gauge go down any? Is the gauge really erratic, like, goes up and then down quickly? I wouldn't overlook the engine fan operation either; make sure it is operating properly.
Easy check for faulty thermostat. Let engine completely cool so hoses are cool to the touch. When cool start engine and run a few minute until you feel a warm UPPER radiator hose. If the Upper Hose is warm/hot and the lower hose is cool then you have a faulty Thermostat.