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  #1  
Old 11-19-2013, 09:39 AM
teebs0 teebs0 is offline
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Question temp sensor

Having a temp gauge problem that is stumping me and my mechanic....I bought the truck and was getting no heat so I replaced the thermostat which immediately made the gauge go into the red. I removed the thermostat and replaced it again and the same problem. I checked the thermostat in boiling water and it opened properly. I then changed the sensor thinking it was sending the wrong signal...No change. We know that the pump is working because the top hose gets warm and the bottom hose is cooler and I get good heat from core. We put it on the tester and monitored the actual temp while test driving, this showed us that the temp was not going over 200 at all even under hard load. So even though it shows it is getting hot it is not. So our conclusion is that either there is another sensor that we should replace or that the gauge itself may be faulty? Any suggestions or ideas?

1996 Ford Ranger XLT 4x4 spd 4.0 litre
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  #2  
Old 11-19-2013, 11:50 AM
cowboybilly9mile cowboybilly9mile is offline
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Default Re: temp sensor

Sounds like a temp gauge problem or the wiring that operates the temp gauge.
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Old 11-19-2013, 06:55 PM
snakebite snakebite is offline
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Default Re: temp sensor

Quote:
Originally Posted by teebs0 View Post
Having a temp gauge problem that is stumping me and my mechanic....I bought the truck and was getting no heat so I replaced the thermostat which immediately made the gauge go into the red. I removed the thermostat and replaced it again and the same problem. I checked the thermostat in boiling water and it opened properly. I then changed the sensor thinking it was sending the wrong signal...No change. We know that the pump is working because the top hose gets warm and the bottom hose is cooler and I get good heat from core. We put it on the tester and monitored the actual temp while test driving, this showed us that the temp was not going over 200 at all even under hard load. So even though it shows it is getting hot it is not. So our conclusion is that either there is another sensor that we should replace or that the gauge itself may be faulty? Any suggestions or ideas?

1996 Ford Ranger XLT 4x4 spd 4.0 litre
Are you sure you changed the right part? The sensor talks to the computer and the sending unit talks to the guage. You need the sending unit. The sending unit looks like this:

Last edited by snakebite; 11-19-2013 at 06:57 PM.
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  #4  
Old 11-19-2013, 07:11 PM
teebs0 teebs0 is offline
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Default

Yes that is the one we changed.
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faulty gauge, overheat, temp sens

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