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When I start the engine of my ford E150 v8, the temp guage goes immediatly to the warm range, when its cold. Is this the temp sensor? Is there a way I can figure out if this is the problem?

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The easiest way to start diagnosing is disconnect temp. sensor connector and connect it to the good known sensor. If gage stays where it was, then this is not the sensor. Next step is to have electrical diagram of this model and see how exactly your gage is connected. It can be reading from ECM signal, or directly from that sensor. If it is direct reading, than it can be faulty gage or dashboard controller. In case it connected to ECM it can be incorrect ECM output (which very unusual).

Posted on May 02, 2013

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Posted on Jan 02, 2017

  • 366 Answers

SOURCE: 2004 Tahoe Heater Problem

check coolant level ,must be low ,chck for coolant loss

Posted on Mar 05, 2009

  • 5 Answers

SOURCE: ford mondeo mk3, intermitent dumping of water from

You may have an air pocket in your system which some times happens.  One way to get rid of it is to take the upper hose off on the engine side,  fill your system with water until it runs out from your engine block, replace the hose, start your car turn you heater on and set to hi keep the radiator cap loose until the temp start to rise then close tight.  Once the air pocket had been remover you can drain some of the water from the radiator using the lower drain plug and add antifreeze.   

Posted on Mar 09, 2009

  • 1 Answer

SOURCE: Audi A4 1.8T Quattro 09/2003 Temp guage rises as

Could be thermostat this regulates the water flow around the engine to keep it cool sounds like it is sticking open when water gets hot!!

Posted on Jun 09, 2009

ghost45
  • 1280 Answers

SOURCE: fluctuating engine temp a/c sends out cold air intermittently

Here's the thing. The ECU will shut down AC if the engine temperature is too hot. If the coolant temperature sensor is malfunctioning (lying to the ECU) telling it that the temperature is hotter than it actually is, the computer will turn the AC OFF.

Posted on Sep 12, 2009

  • 532 Answers

SOURCE: engine diagram for 1998 Ford E150 v8 Coil on #4

i dont have a diagram,but # 1-4 is on the passengers side from front to back,and #5-8 on the drivers side from front to back

Posted on Dec 20, 2009

Testimonial: "thanks for the assistance. No need because the coils on this model happen to be in the front of the vehicle and 4 plugs to a coil. They tested outOK"

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Coolant temperature sensor location on 97 ford expedition


I believe they are located in the intake manifold somewhere. Make sure the one that tells the computer the coolant temp is ACTUALLY giving out the correct temperature. I had a bad one one time in a 1993 Ford F-150, 5.8L....... no check engine light came on but hard to start. The bad sensor was telling the computer it was 32 degrees F when it was almost 80 degrees outside.!!
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Here is a video link from Youtube. There are 2 sensors, 1 for the guage and the other tells the on-board computer how hot/cold the coolant is. The one for the guage has 1-wire and the other one has 2 wires.
Hope this helps, ask more if you need to. What kind of problem are you having? No heat inside? Guage needle not getting into the normal area?


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You may have an air pocket in your system which some times happens.  One way to get rid of it is to take the upper hose off on the engine side,  fill your system with water until it runs out from your engine block, replace the hose, start your car turn you heater on and set to hi keep the radiator cap loose until the temp start to rise then close tight.  Once the air pocket had been remover you can drain some of the water from the radiator using the lower drain plug and add antifreeze.   

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