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04-14-2006, 11:45 AM
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#1
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Join Date: Feb 2005
Location: Cherry Hill
Posts: 388
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fans not turning on
ive got a 160 thermostat and my pcmforless chip telling the pcm to turn the fans on at 160 but all of a sudden yesterday the temp started creeping up and over 220 because the fans werent coming on. i manually engaged the contact on the relay and even jumped it out and boths times the fans came on. so i bought a new relay and sure enough, the fans still are not coming on unless i jump out the relay. wtf? if the relay is good, and the fans are good, as proved by the fact that they do come on when bypassing the relay, then why are they not coming on themselves? also, no trouble codes.
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93 Formula: If it bolts on then I've got it, only some more expensive red tubes to add underneath and to go inside the engine and trans left.
09 G8 GT: Vararam OTR ram air, American Racing long tube headers with x-pipe, Vector 93 ECM/TCM tune, Magnaflow axle backs, MSD ignition coils, Spohn rear trailing and toe link arms, poly differential and subframe bushings, 20 inch aftermarket Camaro rims, brake upgrades.
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04-14-2006, 12:03 PM
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#2
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Join Date: Nov 2004
Posts: 3,530
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fan sensor in the block???
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04-14-2006, 02:23 PM
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#3
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Join Date: Feb 2005
Location: Cherry Hill
Posts: 388
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hhmm... im not sure of what exactly tells the fans to turn on. i know there are two coolant temp sensors on my car, one in the block and one in the water pump area, tho i cant recall at the moment which one does what. i know i replaced the one by the water pump about 2 years ago. does anyone know which does what?
__________________
93 Formula: If it bolts on then I've got it, only some more expensive red tubes to add underneath and to go inside the engine and trans left.
09 G8 GT: Vararam OTR ram air, American Racing long tube headers with x-pipe, Vector 93 ECM/TCM tune, Magnaflow axle backs, MSD ignition coils, Spohn rear trailing and toe link arms, poly differential and subframe bushings, 20 inch aftermarket Camaro rims, brake upgrades.
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04-14-2006, 02:28 PM
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#4
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Join Date: Feb 2005
Location: Cherry Hill
Posts: 388
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did some research and it seems that the one i replaced awhile back is now bad. the waterpump sensor goes to the computer while the block sensor goes to the gauge. if the waterpump sensor fails it fails open, in a position that tells the pcm that the coolant is always cold. that will explain my fans coming on. well looks like i might have solved this. thanks for pointing me in the right direction camaro2you
__________________
93 Formula: If it bolts on then I've got it, only some more expensive red tubes to add underneath and to go inside the engine and trans left.
09 G8 GT: Vararam OTR ram air, American Racing long tube headers with x-pipe, Vector 93 ECM/TCM tune, Magnaflow axle backs, MSD ignition coils, Spohn rear trailing and toe link arms, poly differential and subframe bushings, 20 inch aftermarket Camaro rims, brake upgrades.
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04-14-2006, 02:30 PM
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#5
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Join Date: Nov 2004
Posts: 3,530
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shure np man.
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09-07-2006, 09:00 AM
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#6
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Join Date: Sep 2006
Posts: 3
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fan switch
I used to have tha same problem in my 1991 camaro z28 tpi a year ago.
I put the fan switch to the water pump.
The fan switch is located at the motor head on the passenger side, dont be confused w/the EST sensor.
ESC=Electronic Spark Control
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09-07-2006, 08:21 PM
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#7
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Join Date: Apr 2006
Location: Point Pleasant
Posts: 1,809
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Fan switch ftw 
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-Vinnie
94 2wd SBSC Gmt400. 330CI LSX, Fast 102, Trickflow 205s, close ratio nv3500, 4.30/trutrac.
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