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Unread 10-04-2013, 08:59 AM   #1
jrafols
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Join Date: Apr 2011
Location: ketchikan, ak
Posts: 4
Wj WJ temperature gauge acting up

since last week, my engine temp gauge has been fluctuating from 100 to 210. It makes be believe the a sensor might be loose somewhere because it will read correct for the first 5 minutes when I start the car but after that it goes back down to 100. If I hit a bump on the road the gauge goes up to 210 and then back to 100.


Any ideas?

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Unread 10-04-2013, 09:26 AM   #2
rdkendrick
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2003 WJ 
 
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Location: Cincinnati, Ohio
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Quote:
Originally Posted by jrafols View Post
since last week, my engine temp gauge has been fluctuating from 100 to 210. It makes be believe the a sensor might be loose somewhere because it will read correct for the first 5 minutes when I start the car but after that it goes back down to 100. If I hit a bump on the road the gauge goes up to 210 and then back to 100. Any ideas?
I think it's just a cruddy connector. Did you open the hood and check the connector on the coolant temperature sensor? I believe it is the connector as the sensor would make the gauge rise or fall slowly, because the sensor resistance rises as the heat rises and I don't believe it would just drop or rise, fast.

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Unread 10-04-2013, 02:41 PM   #3
jrafols
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where is that connector located?
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Unread 10-04-2013, 03:43 PM   #4
99_wj_QD
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1999 WJ 
 
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The ECT (Engine Coolant Temp. Sensor) is a very basic sensor so the good news is that it will either be the connector having corrosion and getting intermittent signals or a slowly failing sensor. What engine do you have in the WJ?
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Unread 10-04-2013, 04:14 PM   #5
jrafols
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Inline 6
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Unread 10-04-2013, 07:07 PM   #6
new2site
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It's on the right side of your thermostat housing.
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