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post #1 of (permalink) Old 03-06-2012, 03:06 PM Thread Starter
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Question Temp gauge problem

Hope I'm in the right place to post this. Here's the problem. I have an 05 Impala with the 3.8 V6. A couple of weeks ago when I started the car the temp gauge would peg all the way past hot. (This is at a cold start.) after a few seconds it drops down to around the 240 degree mark and sits there. The engine never gets hot or overheats and there is plenty of coolant in the reservoir. I replaced the coolant temp sensor and it worked for awhile but now it's back to pegging the needle past hot again and when you turn off the key it drops off to the 240 degree mark. Once the engine cools down a little while the needle drops a little more. Any ideas?
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post #2 of (permalink) Old 03-06-2012, 06:03 PM
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Quote:
Originally Posted by luvmychevy View Post
Hope I'm in the right place to post this. Here's the problem. I have an 05 Impala with the 3.8 V6. A couple of weeks ago when I started the car the temp gauge would peg all the way past hot. (This is at a cold start.) after a few seconds it drops down to around the 240 degree mark and sits there. The engine never gets hot or overheats and there is plenty of coolant in the reservoir. I replaced the coolant temp sensor and it worked for awhile but now it's back to pegging the needle past hot again and when you turn off the key it drops off to the 240 degree mark. Once the engine cools down a little while the needle drops a little more. Any ideas?
I would say it is the gauge cluster

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post #3 of (permalink) Old 03-07-2012, 08:15 AM Thread Starter
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That is what my son said. He is a Volvo master tech. He said to turn on the key and reach up and jiggle the wires to see if anything changes. Sounds like a pretty costly repair. Is it possible to install a after market temp gauge maybe under the dash? How big of a job would it be and how and where would it be connected? Thanks for any input you can offer.
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post #4 of (permalink) Old 03-07-2012, 09:43 AM
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Have someone help you, jiggle the pigtail to the temp sensor while watching the gauge and see if it makes a difference. It's not uncommon for the wiring to the sensor to be the issue.

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post #5 of (permalink) Old 03-07-2012, 11:40 AM Thread Starter
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Thanks I'll try that and let you know. You guys are great thanks.
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