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Old 11-11-2005, 08:20 PM   #1
RobertGary1
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1996 SC2
2006 VUE 3.5L
Default Radiator fan coming on late 96 SC2

My fan seems to be taknig too long to come on. Sometimes the gauge is almost in the red before it comes on. I don't think its the ECTS because the gauge would also be indicating low (right??). What other logic does the PCM take into account when deciding when to turn on the fan?

_Robert, 96 SC2

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Old 11-11-2005, 08:24 PM   #2
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Default Re: Radiator fan coming on late 96 SC2

That's it. Keep in mind the gauge is far from a presision instrument. The fan on a 96' should come on over the 3/4 mark but below the RED hot line and go back off at or just below the 1/2 point on the gauge. If the fan is self actuating and you have no driveability, MPG or cold start issues, leave well enough alone.

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Old 11-11-2005, 11:32 PM   #3
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Default Re: Radiator fan coming on late 96 SC2

On the 96 the gauge gets the reading from the same sensor that may be sending the wrong reading to the PCM for the cooling fan. The only data that the PCM uses to turn the cooling fan on (for engine cooling, not AC) is the temp reading from the temp sensor.

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Old 01-10-2012, 02:01 PM   #4
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Default Re: Radiator fan coming on late 96 SC2

Quote:
Originally Posted by wolfman View Post
That's it. Keep in mind the gauge is far from a presision instrument. The fan on a 96' should come on over the 3/4 mark but below the RED hot line and go back off at or just below the 1/2 point on the gauge. If the fan is self actuating and you have no driveability, MPG or cold start issues, leave well enough alone.
Responding to your don't use oil additives. Ive. Even using Roslone ring seal/stop smoke for about 10k miles now and I'm happy w the results so far. Much less oil burning. I did use another brand b4 barbdal? It didnt wrk. But the Roslone worked great. I went from using a qt every week to a qt evry month. Alot less smoke too. It does still smoke when I take the rpm up to 4 but it stops after 4 rpm. And about u not liking products u have to reuse. What about oil? Ask Saturn why we keep the oil industry wealthy! I hate buying oil and. He king it all the time. I have a 99 Sierra w 215k use nothing but Mobil1 and filter. Doesn't leak or burn oil. Shows where they put there money. Solid truck

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