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01-10-2016, 01:20 PM | #1 |
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electric fan question
maybe a dumb question but I'm running dual fans on my 5.3 k10, the one fan stays on as soon as i turn the truck on, the other one will come on once the motor gets up to 200 degrees or so (which has only happened a couple times) my truck will not get much above 150 degrees, how can i fix this and has anyone else ran into this issue? it throws a code for poor performance or something like that
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Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371 |
01-10-2016, 01:30 PM | #2 | |
The Older Generation
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Re: electric fan question
Quote:
You have to set the fans up in the tune. Mine did the same thing until I had the fans re-programed in the tune. I think normally the PCM/ECM/VCMs are programed for 1 fan so the second fan gets power all the time. The LS engines are designed to run hotter for efficiency. My fan1 kicks on at 200º and fan 2 at 215º. Fan 2 never runs. LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
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01-10-2016, 01:31 PM | #3 |
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Re: electric fan question
i see...well crap...thanks tho
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Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371 |
01-10-2016, 01:35 PM | #4 |
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Re: electric fan question
I added to my above post....
LockDoc
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Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - |
01-10-2016, 01:38 PM | #5 |
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Re: electric fan question
thanks man, i appreciate it....guess ill have to get another tune done...
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Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371 |
01-10-2016, 02:46 PM | #6 | |
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Re: electric fan question
Quote:
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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01-12-2016, 02:52 PM | #7 | |
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Re: electric fan question
Quote:
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Sgt Dennis Heineman USMC Aviation Ordnance I.Y.A.O.Y.A.S 2001-Present 84 K10 2000 trans am ws6 2011 nissan altima 2009 Troy Built with a 42 Inch Deck My LS Swap http://67-72chevytrucks.com/vboard/s...=1#post6559371 |
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02-08-2016, 02:26 AM | #8 |
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Re: electric fan question
(sorry, didn't modify my own harness) I've got both fans wired to my "low" temp ground signal from the harness. I also had a "high" temp wire but choose not to use it. To me, if you have dual fans, they should really both come on at the same time. If one is on, it will simply pull air from the least restrictive location..... the other fan opening, not from the other side of the fins. I also have an override switch to turn them on when my AC is on, so airflow is going across the condenser.
Check the wiring and tune I guess but think about just running off one ground signal. edit: open fan hole comment is for those running shrouds, not fans directly mounted to radiator
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02-08-2016, 03:30 AM | #9 | |
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Re: electric fan question
Quote:
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My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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02-08-2016, 08:25 AM | #10 |
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Re: electric fan question
This is correct, Both fans run 1/2 speed at the same time on low . The gm system requires a three relay system for it to work . If you only have 2 relays it will not do this . Also if your fan comes on at ignition on only ( no start up ) its either you have it wired improper or the pcm has a problem .
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03-27-2016, 08:10 AM | #11 |
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Re: electric fan question
The three relay going to a vintage air trinary switch, anyone have a diagram i could follow for my build?
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