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| Still trying to troubleshoot a cooling issue (Page 2/3) |
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Cliff Pennock
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NOV 26, 12:02 PM
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No, I'm not loosing coolant. The fan does come on, but rarely. And when it does, temperature drops, but not drastically. I have a new radiator which cools much, much better than the stock radiator so I know it cools quite a bit - even without the fan on.
I need to make/buy an ALDL cable and see what the ECM says...
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cvxjet
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NOV 26, 02:18 PM
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You have two temperature sensors operational; A) The gauge sensor and B) the fan sensor.....you changed the temp sensor and your gauge is reading high...but your fan rarely comes on- which is (basically) normal.
l think the gauge sensor is off....your fan would be on all the time if the temperature was really way up...change the fan sensor out for another (different manufacturer) sensor.
Should have stated "Change your GAUGE sensor for another one...(sorry)[This message has been edited by cvxjet (edited 11-26-2024).]
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Patrick
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NOV 26, 03:04 PM
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| quote | Originally posted by cvxjet:
l think the gauge sensor is off....your fan would be on all the time if the temperature was really way up... change the fan sensor out for another (different manufacturer) sensor.
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???
I don't really understand the reasoning for this. The cooling system isn't demonstrating any overt signs of overheating (ie puking coolant out the reservoir). The Fiero's temp gauge reading incorrectly is a common issue. I don't see the point then of changing out the fan switch... unless it's to perhaps install a 210° on and 200° off fan switch, which is a common mod.[This message has been edited by Patrick (edited 11-26-2024).]
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cvxjet
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NOV 26, 05:05 PM
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l blew it- change the GAUGE sensor is what l meant.....(l was eating lunch while typing)
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Raydar
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NOV 26, 05:51 PM
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It very well could be the gauge sender - the one on the corner of the head, below the coil.
I saw one on a friend's car go bad a few weeks ago. First one ever.
Figured it out it was that, after he did everything else.
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Cliff Pennock
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NOV 27, 05:05 AM
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The temperature sender (or the "gauge sensor") was replaced for a new one when the engine was fixed. So yes, it could be defective but it is already a new one.
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sleek fiero
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NOV 27, 10:54 AM
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Cliff I think I would go back to your mechanic and ask him to check the actual temp compared to gauge reading. At least then you will know if it is truly running hotter than it should. He will have the tools to make a proper assessment. sleek
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steve308
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NOV 27, 11:42 AM
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| quote | Originally posted by Cliff Pennock:
No, I'm not loosing coolant. The fan does come on, but rarely. And when it does, temperature drops, but not drastically. I have a new radiator which cools much, much better than the stock radiator so I know it cools quite a bit - even without the fan on.
I need to make/buy an ALDL cable and see what the ECM says... |
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Sounds like the fan motor might be tired. Change the fan motor, it's a cheap easy repair. If all else fails, use the search feature  (sorry couldn't resist)
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Cliff Pennock
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NOV 27, 12:04 PM
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The fan is fine. When it comes on, it spins as it should.
We already took temperature readings (with a temperature gun). The (new) temperature gauge sender read 130°C/265°F, measured at the metal part of the sensor. But since that sensor is only inches away from the exhaust header, we weren't sure if that was the actual temperature of the coolant.
I have a thermal camera. As soon as the weather clears up, I'll take some more readings on different spots.
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sleek fiero
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NOV 27, 05:29 PM
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A shop should have a thermal transducer that hey screw in in place of your sensor and will give you an exact temp reading so you know for sure the internal liquid temp. Believe me I have been doing this for almost 60 years. sleek
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