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Temp sending unit

  #1  
Old 06-09-2018, 06:15 PM
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Temp sending unit

I'm helping a friend work on his 1997 4.6 , temp gage doesn't work . Diagrams show two sending / sensor units . It has 2 connectors but only one sensor ? Can read engine temp with code reader , could this be an engine swap or we over looking a sensor ? Thanks
 
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Old 06-09-2018, 07:33 PM
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I believe there are 2 sensors - one for the gauge and one for the PCM.
 
  #3  
Old 06-10-2018, 09:53 AM
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Sensor

Looked all over , looking at wire it should be only a couple of inchís away . Thereís only one . That and huge scratch under hood makes me think motor has been swapped . I can add to wires if I can find where it is .
 
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Old 06-10-2018, 06:25 PM
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2nd try

took off alternator , no second sensor ? Iím lost
 
  #5  
Old 06-12-2018, 07:01 PM
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The sensor is threaded into the front of the intake manifold coolant crossover on the passenger side across from the thermostat/upper radiator hose connection.
 

Last edited by ErikShockey; 06-12-2018 at 07:34 PM.
  #6  
Old 06-12-2018, 09:20 PM
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If I unplug this one computer readout goes away , still donít see a second sensor

Originally Posted by ErikShockey View Post
The sensor is threaded into the front of the intake manifold coolant crossover on the passenger side across from the thermostat/upper radiator hose connection.


 
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Old 06-12-2018, 09:34 PM
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...
 

Last edited by ErikShockey; 06-12-2018 at 10:23 PM.
  #8  
Old 06-12-2018, 09:39 PM
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Last edited by ErikShockey; 06-12-2018 at 10:23 PM.
  #9  
Old 06-12-2018, 10:28 PM
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Okay sorry for the confusion bud. I have a 97 and 99 4.6 and got them confused, both trucks are different.

I fianlly got off my lazy *** and walked over to the 97 and you are correct. Either that truck had an engine swap or the intake manifold replaced.

Here is what it looks like on my 97. The two sensors are side by side


 
  #10  
Old 06-13-2018, 07:28 AM
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Itís factory , we have concluded the engine is a transplant, now to find the location of sensor on this one ?
 
  #11  
Old 06-13-2018, 07:26 PM
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Ford stopped using two sensors in 1999 so you won't find another sensor.

You will need to add the second sensor to the cooling system yourself if you want the gauge to work again.
 
  #12  
Old 06-14-2018, 12:57 AM
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It's also not a coolant temp sensor, it's a cylinder head temp sensor on the 99+.
 
  #13  
Old 06-14-2018, 01:46 PM
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Thanks

Found a gauge on amazon that it programable to read out any obd data in real time , thanks
 


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