Question about 1994 Oldsmobile Cutlass Ciera

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Temperature gauge goes in the red. i replaced thermostat. engine does not appear to be hot. could it be an electrical wire causing the gauge to go into the red.

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You most likely have a blocked radiator based on the vehicle's age, which will not allow all the coolant in your cooling system to circulate enough to cool the engine. The fans that blow on the radiator won't help much when this happens and at a stop the motor will get hot and the gauge will go in the red because the vehicle really is getting too hot. Just because you don't see steam erupting from the engine compartment does not mean the vehicle is not overheating. It is not very likely electrical short or related issue would make the gauge read high.

Posted on Sep 28, 2010

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Replace the coolant temp sender

Posted on Sep 28, 2010

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How do I replace a thermostat in a 1999 Ford Explorer?


James from Auto.Repairs
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I'am feeling that your issue is not really with the thermostat my friend. what your describing seems to be the coolant temperature sensor.
And or a loose connection to the sensor 48121ee4-0616-4184-b990-49f490eea9c0.jpg fa29c095-9038-43aa-aeee-f9ad43acb595.jpg

Try turning the key on engine off and look at the coolant gauge
now go out and under the hood it should be in the thermostat housing where the thermostat goes to you should see the #1 picture with 2 wires going to it if you unplug it and go back into the car and look at the gauge it should be in the red hot zone.
if not then your gauge has a short to it lightly with your palm of your hand rap on top of the dash nearest to the gauge and see if it tries to go up if it does then most likely it is a short in the cluster or harness.
and if when cts is unpluged and it goes all the way in the hot zone and when you plug it back in and it goes back into the cold and stay there should be that it is fine just loose connector or needs cleaned if when you wiggle wires and the needle goes up and down then you need to replace the plug and I would still suggest replacing the coolant temp sensor as for it may have been shorted do to the loose connection.

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Trouble codes p0118 temperature po118


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When your temperature gauge reaches "H' it may too late to prevent a major breakdown. Knowing the symptoms of an overheated car and how they occur may be the difference between being inconvenienced and incapacitated.
Identification:---Other than a low oil level or low oil pressure light, there is not a more significant part of a car's instrumentation than a rising temperature gauge or a glowing "Hot" light. These lights are really the only confirmation a driver has that his car is really overheating. It is the identification of the symptoms of an overheating car that enable the motorist to avert a badly damaged engine. Overheating is always a traumatic event for a car's engine, which makes the early identification of the symptom an important addition to the informed motorist's tool kit.
Stuck Thermostat:--The car's thermostat is a valve that controls coolant flow from the engine block to the radiator. When the engine is cold the thermostat remains closed so that the coolant can reach operating temperature quicker and also provide heat to the passenger's compartment. The thermostat has a spring on it that moves depending on coolant temperature causing the thermostat to open. Sometimes the thermostat fails to open thus restricting coolant flow to the radiator where it would be cooled down. This condition is often the cause of overheating. The symptoms of this cause would be a rising temperature gauge and possibly the loss of heat inside the car.
Restricted Radiator:---A car's radiator will have thousands of gallons of coolant passing through in its lifetime. Along with the coolant comes particulate matter in the form of corrosion breaking loose from various parts of the car's cooling system. These contaminates collect in the tubes of the radiator reducing its efficiency. Extensive "plugging" in the radiator will cause the car to overheat. The symptom of this condition would be a rising temperature gauge which goes up when you accelerate.
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