LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Cooling fans not working

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Old Nov 5, 2007 | 03:23 PM
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Unhappy Cooling fans not working

I have a 97 ss, and the cooling fans wont come on when it gets up to temp. Ive been turning the a/c on, which will kick the fans on to keep it from overheating. I went through and checked all of my fuses and relays, and they all work. Could it be a temp sensor, and if so which one. I believe theres 2 on the car. Thanks for the help.
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Old Nov 5, 2007 | 03:58 PM
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How high do you mean by "up to temp"?
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Old Nov 5, 2007 | 04:35 PM
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Im the same way if i dont turn on my heater or ac it will go till it cant take no more
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Old Nov 5, 2007 | 06:09 PM
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When I say up to temp I mean 210 if I dont turn the a/c on it would start to overheat. The only way the fans turn on is if I turn it to max ac.
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Old Nov 5, 2007 | 06:12 PM
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check your t-stat and your ECT sensor.
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Old Nov 5, 2007 | 06:21 PM
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I don't think the fans even think about turning on at 210? I could be wrong..
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Old Nov 5, 2007 | 06:54 PM
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Originally Posted by bmf97ss
When I say up to temp I mean 210 if I dont turn the a/c on it would start to overheat. The only way the fans turn on is if I turn it to max ac.
That's why I asked. If you have the stock tune the fans not coming on at 210 is perfectly normal. The stock settings do not engage the fans until 225 (first fan) and 234 (second fan).

The number one answer to most of these my fans are not turning on threads is that people are not aware the stock settings are so high.
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Old Nov 5, 2007 | 10:22 PM
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So your saying that the needle on the temp gauge is supposed to go past the 210 mark and damn near overheat before the fans are going to kick on? Ive been to scared to let go any hotter than around 220 in fear of a melt down and ill flip on the a/c and steadily watch the temp drop until I get the car rolling again. That just doesnt sound right my friends ls1's never go a hair past 210. At 236 or whatever its almost in the red zone.
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Old Nov 5, 2007 | 10:50 PM
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Originally Posted by bmf97ss
So your saying that the needle on the temp gauge is supposed to go past the 210 mark and damn near overheat before the fans are going to kick on? Ive been to scared to let go any hotter than around 220 in fear of a melt down and ill flip on the a/c and steadily watch the temp drop until I get the car rolling again. That just doesnt sound right my friends ls1's never go a hair past 210. At 236 or whatever its almost in the red zone.
LT1's are hotter engines, period. They can handle the heat better than LS1's also.
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Old Nov 5, 2007 | 10:56 PM
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Originally Posted by bmf97ss
So your saying that the needle on the temp gauge is supposed to go past the 210 mark and damn near overheat before the fans are going to kick on?
I'm not saying that's the optimal thing to do. I (and most everyone else) think the stock setting is way too high. But that is the correct fan behavior unless you have a tune or manual fan switch (i.e. nothing is wrong or malfunctioning).
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Old Nov 6, 2007 | 08:44 AM
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Have the PCM retuned to turn the fans on at a lower temp and add a 160 thermostat - my temps never exceed 180 now!
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Old Nov 6, 2007 | 09:26 AM
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my friend i have good solution for you

go to the nearest computer checker and check all your sensors it will take 10 minute from you

and don't waste your time on thinking

cy
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