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post #1 of 7 Old 10-09-2012, 12:24 PM Thread Starter
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engine fan

on my 06 is the fan suppose run all the time
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post #2 of 7 Old 10-09-2012, 01:09 PM
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Is it supposed to spin? Yes. Is it supposed to be fully engaged all the time? No.

Not sure if that makes sense or not, but the fan clutch engages when coolant temp hits a certain number and you can hear the fan come on. But it will spin 100% of the time regardless.

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Last edited by Snake; 10-09-2012 at 01:19 PM.
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post #3 of 7 Old 10-09-2012, 01:18 PM Thread Starter
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It's on all the time
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post #4 of 7 Old 10-09-2012, 02:50 PM
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Copy/paste from Bismic.

Engine temperature is not the only parameter that the PCM monitors to determine cooling fan operation. This is the reason that you will see some variation in engine temperature as it correlates to fan operation. The operation/description of the FSS (Fan Speed Sensor) from the PC/ED manual has a fairly good explanation as to how the system "thinks". This is not your traditional engine hits temp X and the fan clutch locks up. The fan speed sensor is a Hall-Effect sensor integral to the vistronic drive fan (VDF). The powertrain control module (PCM) will monitor sensor inputs and control the VDF speed based upon engine coolant temperature (ECT), transmission fluid temperature (TFT) and intake air temperature (IAT) requirements. When an increase in fan speed for vehicle cooling is requested, the PCM will monitor the FSS signal and output the required pulse width modulated (PWM) signal to a fluid port valve within the VDF.


Start simple with going over the wire harness.

Check out post #36 from Deltajohn.
Time for a new fan clutch


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2004 F350 CC DRW King Ranch
X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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post #5 of 7 Old 10-09-2012, 04:19 PM
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It runs all the time, just different RPM levels for different parameters being met.

Like at idle, it can be at 400 RPMs.
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post #6 of 7 Old 10-09-2012, 05:01 PM Thread Starter
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now that i understand thanks
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post #7 of 7 Old 10-09-2012, 06:25 PM
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Here is what the internals look like.


And here is a demo of the coil.


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X-3 tunes by DJ'S,QT,GH,ID. Gryphon FICM tunes, ARP studs,Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,AD2,Snow Perf stage II,EGR delete,4" turbo back straight pipe,S&Bintake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB
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