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Thread: cooling fans won't run on high
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01-10-2008, 05:39 PM #1
- Join Date
- Feb 2006
- Location
- GARDEN GROVE, CA
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- 50
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- 95
BLACK- 2002, CAMARO Z28
cooling fans won't run on high
I've had them programmed for a while with a predator to run cooler and all the sudden they wont run on high, only low. What should I check?
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01-11-2008, 08:05 AM #2
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- Jul 2005
- Location
- Jacksonville, FL
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- 2,723
It should be throwing a code if there was a fan/relay issue right? I've got mine set 194/185 for high speed and since it's cooler now they rarely run at high speed (I have LEDs and can see them come on). Since you have a Predator I'd look at real time data/ECT temp and make sure you're meeting the threshold for them to come on first.
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01-11-2008, 08:24 AM #3
- Join Date
- Feb 2006
- Location
- GARDEN GROVE, CA
- Age
- 50
- Posts
- 95
BLACK- 2002, CAMARO Z28
On live data the ect's are 20 degree's higher than usual with the fans reprogrammed. The low fan setting do work though. I have unloaded and reloaded the predator tune a few times and nothing. I found online that the No. 2 relay controls the high speed setting. I'm gonna replace it.
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01-11-2008, 08:39 AM #4
- Join Date
- Jul 2005
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- Jacksonville, FL
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- 2,723
Don't know if it makes a difference, but maybe the temp settings are overlaping? Here's what mine are set to just for info:
Fan 1 (low) - on 184/off 175
Fan 2 (high) - on 194/off 185
Still think you'd throw a code if it was a relay.
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01-11-2008, 08:48 AM #5
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- Jul 2005
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- Jacksonville, FL
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More info on fan/relay operation here under diagnostics for P0481. www.gearchatter.com/viewtopic8997.php
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