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  #1  
Old 11-19-2017, 12:14 PM
Grizzlysam Grizzlysam is offline
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Join Date: Feb 2012
Posts: 24
Default Temperature gauge issues

I have a 98 xlt 4.0.

Truck has been out of service for a while and finally recently got it running again. Been driving around town for a few weeks, with no real issues, but after 1 or 2 days of recent highway driving, the temperature guage jumped up to H and stayed there. Even after truck fully cooled down.

Today I replaced the thermostat and temperature SENDING unit, but not the temperature SENSOR for the PCM.

As soon as I got it back together and started it up, the gauge went straight to C. But as I test drove it, the gauge stayed pegged on C the whole time. Even after going on the interstate for a few minutes.

Should I have replaced the SENSOR also?

Thanks in advance.
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98 Ranger XLT 4.0L V6
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  #2  
Old 01-08-2018, 08:10 AM
CharlieM CharlieM is offline
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Join Date: Jul 2014
Posts: 91
Default Re: Temperature gauge issues

You able to figure this out. I had a same issue 2 temp sensor from auto zone none worked correctly
So i went on the change out to After market temp gauge , found at LMCTruck.com the pillar mount x3 and gauge for oil pressure, temp and volt meter I going to install soon
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Dont fix it unless it's broken or you really bored
2000 Ranger XLT 4X4 4.0 now 5 speed manual trans

1993 Ranger XL 4x2 3.0l Auto
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  #3  
Old 01-08-2018, 05:44 PM
Grizzlysam Grizzlysam is offline
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Default Re: Temperature gauge issues

Quote:
Originally Posted by CharlieM View Post
You able to figure this out. I had a same issue 2 temp sensor from auto zone none worked correctly
So i went on the change out to After market temp gauge , found at LMCTruck.com the pillar mount x3 and gauge for oil pressure, temp and volt meter I going to install soon

I think I figured that I bought the wrong sensor, but I think it was labeled as what I needed, just not an oem part. A Motorcraft replacement should do the trick
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  #4  
Old 01-08-2018, 08:08 PM
Grumpa Grumpa is offline
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Default Re: Temperature gauge issues

Don't use pipe tape or any sealant on the threads. It needs to make good contact to ground properly. Make sure the plug fit snugly as well. Also make sure you have a proper coolant level. Air pockets can cause weird gauge readings.
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1995 Ranger XLT 3.0L OBDII
Trans: A4LD (E) 2WD
Rear: 7.5 / 3.45 NL LHD
Tires:GY P235 75/R15 (orig 225 70/R14)
Long Bed, 20 Gal Tank
Up to 229,900 miles
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  #5  
Old 01-18-2018, 09:57 PM
CharlieM CharlieM is offline
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Default Re: Temperature gauge issues

make sure you do some type of air pocket removal. have truck pointing up to allow for the air to move to highest point
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Dont fix it unless it's broken or you really bored
2000 Ranger XLT 4X4 4.0 now 5 speed manual trans

1993 Ranger XL 4x2 3.0l Auto
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