99 Coolant temp. guage... Working?????
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TECH Enthusiast
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Joined: Nov 2001
Posts: 607
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From: Chattanooga,TN
99 Coolant temp. guage... Working????? I can not figure this out... My 99 SS has 50K miles on it. I bought it new, and until now my coolant temp guage was doing just like everyone else's. It would show the correct temp until 210 degrees and then stay there. Now, my guage will come up to 210 and start going back down when I am driving. It will go down to about 160 degrees. I still have the stock thermostat, and it just started as winter arrived about 4 months ago. I had a friend check it with autotap, but it was warmer outside and it was showing correctly. Any ideas???
Teching In
Joined: Feb 2002
Posts: 49
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From: Music City
Re: 99 Coolant temp. guage... Working????? I have a 99 and have never trusted my temp gauge. Once my car hits about 150* my temp gauge reads exactly 200* and will stay there no matter what the actual temp is. It has never moved from that position and I have had a 170* and 160* thermostat in my car. My advice for accurate temp readings is to get an aftermarket gauge and never trust the factory one. As far as your gauge fliping out, I would not worry about it as long as atap says your temp is fine.
