 Temperature gauge acting up |
 Aug 20, 2006 - 2:59 PM
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Enthusiast  Joined May 2, '06 From Nevada Currently Offline Reputation: 0 (0%)  |
Suddenly, my coolant temp. gauge started fluctuating.
It always was rock solid at a little below midline, regardless of 120F+ heat outside. Couple days ago, it started fluctuatiung between normal and ~ 1/4 position. It never went above normal - only below. My car has no modifications, new termostat + coolant flush 3 months ago. No overheating problems ever. It is 95 GT auto. Anyone had similar experience or ideas what it could be? |
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Aug 20, 2006 - 3:04 PM
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 Enthusiast Joined Aug 31, '02 From Philadelphia, PA Currently Offline Reputation: 8 (100%) |
mine kind of started doing the same thing. it would read cooler when i was on the highway, and normal when driving around town. i never did figure it out, but it seems to be back to normal...for now at least.
-------------------- 15PSI - 30MPG - Megasquirt Tuned
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Aug 20, 2006 - 4:00 PM
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 Enthusiast Joined Dec 3, '04 From torrance, ca Currently Offline Reputation: 0 (0%) |
maybe you have air bubbles in your coolant lines?
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Aug 20, 2006 - 5:33 PM
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Enthusiast Joined May 2, '06 From Nevada Currently Offline Reputation: 0 (0%) |
QUOTE(hellsyphon @ Aug 20, 2006 - 4:00 PM) [snapback]470909[/snapback] maybe you have air bubbles in your coolant lines? All of a sudden - I have not touched my cooling system for 3 months? |
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Aug 20, 2006 - 5:47 PM
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Enthusiast Joined May 30, '05 From MN Currently Offline Reputation: 8 (100%) |
That happened to me before. After checking for air bulbbles and doing a system flush I found out my radiator had a very small leak from a crack in the radiator. You might want to take a good look at the radiator itself to make sure.
-------------------- 3sgteing.
..burns twice as bright, lasts half as long. "The weight of the world is love. Under the burden of solitude, under the burden of dissatisfaction." -Allen Ginsberg- |
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Aug 20, 2006 - 9:19 PM
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 Enthusiast Joined Jun 1, '03 From WV Currently Offline Reputation: 2 (100%) |
I have my coolent lines disconnected from my intake manifold. And I have a ram-air type scoop for air. When I go around 70 to 80 + mph on a cool night, my temp drops. Otherwise, I think you have a thermostat problem. They aren't expencive or hard to change, so might as well.
-------------------- Live Free, Be Happy
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Aug 20, 2006 - 9:40 PM
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Enthusiast Joined Jul 7, '04 From Maryland Currently Offline Reputation: 0 (0%) |
mine been dropping below when driving and goes to normal when idle
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Aug 21, 2006 - 1:07 AM
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 Enthusiast Joined Mar 8, '04 From Newport, RI Currently Offline Reputation: 63 (99%) |
if your temp is normal at idle (about 1/2) and low (about 1/4) on the highway, then it is your thermostat that is stuck open. The coolant is flowing through your system continously. Replace the thermostat and then it will be fine (about 1/2) all the time.
on a side note, our engines were designed run at the normal optimal temp. Anything else isn't correct 
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Aug 21, 2006 - 10:00 AM
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Enthusiast Joined May 2, '06 From Nevada Currently Offline Reputation: 0 (0%) |
QUOTE(Batman722 @ Aug 21, 2006 - 1:07 AM) [snapback]471057[/snapback] if your temp is normal at idle (about 1/2) and low (about 1/4) on the highway, then it is your thermostat that is stuck open. The coolant is flowing through your system continously. Replace the thermostat and then it will be fine (about 1/2) all the time. on a side note, our engines were designed run at the normal optimal temp. Anything else isn't correct Thermostat replced 3 months ago - new toyota. I just purged the air - still the same - 1/4 at idle or drive, sometimes shoots up to normal, then drops. More ideas? Anyone has a spare temp. sender? |
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