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1994 Ford Thunderbird Overheating - Engine
Question: Hello, We have a 1994 Ford T-Bird LX w/3.8L. When the engine is started from cold - warm-up is normal and heat would enter the passenger cabin. Last week, all of a sudden, about 10 miles into a trip, simultaneously the temperature gauge would peg high, the check engine light would illuminate, the radiator fan would stop and the heat to the passenger cabin would go cold... A few minute later the temp gauge would fluctuate, the check engine light would go on and off, the heat would not return and the radiator fan would work occassionally but not normally. Fortunatly, or not, this occurs continuously.
Things done so far:
Flushed cooling system and new anti-freeze - vented engine during filling and top-off to rid the air trap.
Replaced thermostat.
Tested coolant temperature sensor in cold --> hot water with ohm meter - 57K cold and ~2K hot with nice linear meter readings.
Repaired a hose leak at the overflow tank.
Also, there is single wire sensor on the cabin heater hose from the engine to the firewall - what is this sensor - resembles the temperature gauge sensor at the thermostat.
Thank you for your time and help. - Lee
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Technican: The temperature gauge pegging is the problem. Have your car checked for a blown head gaskets.
White smoke from the exhaust, air bubbles or gurgling in the radiator (only remove radiator cap on cold engine then start engine and allow it reach normal temps), or coolant mixing with the engine oil are common signs.
Or have a radiator shop or repair facility "sniff" the radiator for the existance of combustion gases. Here's How To Get Guaranteed Solutions In Minutes
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