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06-30-2012, 06:55 PM
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#1 | | Registered User
Join Date: Jun 2012
Posts: 85
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So I'm wondering if anyone knows why my thermostat would be normal while driving and idling but when I turn the car off and take the key out it rises all the way above the red line? it only does it if the lights are on after I turn it off, and when I turn the lights off it will stop and stay where it is, it won't go down or up.
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06-30-2012, 07:06 PM
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#2 | | Blogger
Join Date: Jan 2009
Posts: 4,403
| Quote: |
Originally Posted by dray492 So I'm wondering if anyone knows why my thermostat would be normal while driving and idling but when I turn the car off and take the key out it rises all the way above the red line? it only does it if the lights are on after I turn it off, and when I turn the lights off it will stop and stay where it is, it won't go down or up. | Maybe it doesnt like you. Seriously I have no idea, but I know a few people got opinions.
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06-30-2012, 07:48 PM
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#3 | | Registered User
Join Date: Mar 2012
Posts: 1,704
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Originally Posted by dray492 So I'm wondering if anyone knows why my thermostat would be normal while driving and idling but when I turn the car off and take the key out it rises all the way above the red line? it only does it if the lights are on after I turn it off, and when I turn the lights off it will stop and stay where it is, it won't go down or up. | Aftermarket gauge..
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2001 Mustang GT 4.6..
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06-30-2012, 08:05 PM
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#4 | | Registered User
Join Date: Jun 2012
Posts: 85
| Quote: |
Originally Posted by sixpac
Aftermarket gauge..
| Are you asking if it is or telling me to get one? It's the original one in the dash.
---------- Post added at 10:05 PM ---------- Previous post was at 10:03 PM ----------
Quote: |
Originally Posted by 99ford
Maybe it doesnt like you. Seriously I have no idea, but I know a few people got opinions.
| It better like me lol I'm going to have her for the rest of her life
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06-30-2012, 08:07 PM
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#5 | | Evolution's Finest
Join Date: Feb 2012
Posts: 6,118
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I bet when you start the car up, it drops back down to a more normal level, right? If so, it's probably just heat soak against the temp sensor.
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06-30-2012, 08:07 PM
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#6 | | Registered User
Join Date: Jun 2012
Posts: 85
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Originally Posted by Azure I bet when you start the car up, it drops back down to a more normal level, right? If so, it's probably just heat soak against the temp sensor. | Yeah it does
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06-30-2012, 08:08 PM
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#7 | | Registered User
Join Date: Aug 2011
Posts: 2,524
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Gauge going bad or just a bad connection somewhere!..
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06-30-2012, 08:12 PM
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#8 | | Evolution's Finest
Join Date: Feb 2012
Posts: 6,118
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Originally Posted by dray492
Yeah it does
| Seems like this isn't such a bad thing, as long as it seems to be reading okay when the engine is actually running. It's probably not an accurate reading when the radiator fluid is flowing.
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06-30-2012, 08:38 PM
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#9 | | Registered User
Join Date: Mar 2012
Posts: 1,704
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Originally Posted by dray492
Are you asking if it is or telling me to get one? It's the original one in the dash.
---------- Post added at 10:05 PM ---------- Previous post was at 10:03 PM ----------
It better like me lol I'm going to have her for the rest of her life
| I would say get one..
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2001 Mustang GT 4.6..
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06-30-2012, 08:41 PM
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#10 | | Moderator Emeritus
Join Date: Aug 2011
Posts: 4,767
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Just a little FYI the actual temp will rise slightly before cooling.. Hence cool down laps for race cars and bikes.
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That's unimpressive
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06-30-2012, 09:03 PM
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#11 | | Registered User
Join Date: Jun 2012
Posts: 85
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Alright thanks for the info everyone.
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07-02-2012, 02:53 PM
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#12 | | Registered User
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07-02-2012, 03:00 PM
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#13 | | Evolution's Finest
Join Date: Feb 2012
Posts: 6,118
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Originally Posted by dray492 | Well that's just nutty as hell. Did it just start doing that all of a sudden?
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07-02-2012, 03:04 PM
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#14 | | Registered User
Join Date: Jun 2012
Posts: 85
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It's been doing it since I got the car a little over a week ago.
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07-02-2012, 03:08 PM
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#15 | | Registered User
Join Date: Aug 2011
Posts: 2,524
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You've got to have bit of a short some were!.. That is just weird!..
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07-02-2012, 03:28 PM
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#16 | | Evolution's Finest
Join Date: Feb 2012
Posts: 6,118
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When the car is running, it works fine? Does the temp drop as the engine warms up, or go up as it should?
---------- Post added at 05:28 PM ---------- Previous post was at 05:21 PM ----------
Even though the link here is for a different car, our cars should be similar. Check it out... http://www.howstuffinmycarworks.com/...mp_sensor.html
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07-02-2012, 04:20 PM
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#17 | | Registered User
Join Date: Jun 2012
Posts: 85
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Originally Posted by Azure When the car is running, it works fine? Does the temp drop as the engine warms up, or go up as it should?
---------- Post added at 05:28 PM ---------- Previous post was at 05:21 PM ----------
Even though the link here is for a different car, our cars should be similar. Check it out... http://www.howstuffinmycarworks.com/...mp_sensor.html | yes, it works as it should while its running. I will check the link out thanks
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Once its cool and I start it the needle starts at the bottom and rises like normal
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07-02-2012, 08:05 PM
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#18 | | Senior Member
Join Date: Jun 2006
Posts: 8,786
| Re: whacky thermostat
I haven't really paid attention to my 86 to see what it does, but I do know some car's gauges will go to the upper end of the spectrum when they are switched off. As long as the gauge is functioning normally with the power on I wouldn't be to worried about it.
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07-02-2012, 09:43 PM
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#19 | | Registered User
Join Date: Jun 2012
Posts: 85
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Originally Posted by Trojan Horse I haven't really paid attention to my 86 to see what it does, but I do know some car's gauges will go to the upper end of the spectrum when they are switched off. As long as the gauge is functioning normally with the power on I wouldn't be to worried about it. | Yeah its been running good so for now I won't worry about it.
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07-02-2012, 09:47 PM
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#20 | | Registered User
Join Date: Jun 2011
Posts: 478
| Re: whacky thermostat
Mine does this too but I thought it was because it was an analog guage and not a digital. Works great when running and with power on but not running so who knows...
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07-02-2012, 10:13 PM
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#21 | | Registered User
Join Date: Feb 2012
Posts: 170
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Ya mine does on occasion too. Ill get in see it at top of guage, but as soon as turn key to prime pump drops to bottom and works.
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07-02-2012, 10:42 PM
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#22 | | Registered User
Join Date: Jun 2012
Posts: 85
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Originally Posted by wc3john Mine does this too but I thought it was because it was an analog guage and not a digital. Works great when running and with power on but not running so who knows... | Well its nice to hear I'm not the only one this happens to.
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