What controls fan turn on?
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What controls fan turn on?
Probably a lame question, but have been unable to find/ determine the answer... Before installing my aftermarket ALRADCO radiator, my car would get pretty hot. I am 99% sure the fans are not working correctly, as they come on at 224-226. They don't come on in low speed earlier like I was told they were supposed to, they just come on at 226. I checked this again by blocking the rad and getting it hot enough where fans will come on, and sure enough they come on at 226 then back off at 218ish. I know a programmer is supposedly able to change fan turn on point to your liking, but isn't the fan supposed to come on like at 210 at low?
If they are supposed to come on then (or close to it, or low/high) what controls that? I imagine the temp sender just reads the temps, and the relay controls turn on, but there seems to only be one relay for high low settings. Could this be the issue?
Sorry if this is a lame question, new to the V, and new to LS motors as well. Thanks in advance!
James
If they are supposed to come on then (or close to it, or low/high) what controls that? I imagine the temp sender just reads the temps, and the relay controls turn on, but there seems to only be one relay for high low settings. Could this be the issue?
Sorry if this is a lame question, new to the V, and new to LS motors as well. Thanks in advance!
James
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You are the man. Thank you very much! So I guess I can assume when my fans come on at 226-228, that is low, and if I ever got to 235 they'd kick on higher, that's what you mean by fan 1 and 2, as in fan settings, not really separate running fans. Good info, thank you.
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What is that based on? That's not what the FSM says, and it doesn't appear to be what my '05 does. With a stock radiator and (AFAIK) stock fan settings I've never seen temps anywhere near that high, even during track sessions. The fact that Squid4life is seeing temps that high in normal driving implies to me that his fans aren't turning on when they should.
Last edited by AAIIIC; 10-15-2011 at 07:54 PM.
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Hmmm... My fans come on as a pair, shut off as a pair. I am not so worried about the temps thanks to the new radiator, but want to confirm all is working correctly in the case I get stuck in traffic in the desert or something...
#10
I thought I saw them turn on one at a time, but I could be wrong.
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Word of advise. If you use a handheld (or any tuner) make SURE your battery has a good charge. And turn everything off, lights, radio, don't open a door. A lot of things on a Caddi can interrupt a flash.
This happened to me with an older superchips tuner. Car was dead, and the tuner could not recognize the PCM. I had to send out the PCM to get re-flashed.
This happened to me with an older superchips tuner. Car was dead, and the tuner could not recognize the PCM. I had to send out the PCM to get re-flashed.
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Word of advise. If you use a handheld (or any tuner) make SURE your battery has a good charge. And turn everything off, lights, radio, don't open a door. A lot of things on a Caddi can interrupt a flash.
This happened to me with an older superchips tuner. Car was dead, and the tuner could not recognize the PCM. I had to send out the PCM to get re-flashed.
This happened to me with an older superchips tuner. Car was dead, and the tuner could not recognize the PCM. I had to send out the PCM to get re-flashed.
I guess I need to start searching on what tuner is best now, and where to get a custom tune...