clutch fan

[tom anderson]

Is there any specifications (ECT) as to when the clutch fan is to engage? When towing with my old 7.3 I would hear it come on when towing especially going up hills. This 6.0 (EGR delete, new oil cooler, etc) has never had the fan engage (I have not heard it) while towing my 30 foot trailer. My ECT have gone up to 215 on the pulls. Is there a way to program the fan to kick it at any given temperature? Is there a way to troubleshoot the fan, or determine what the temp is for it to engage?

[Evil Eye]

Yes, custom tuning allows you to adjust those parameters, but you must understand that the fan doesn't JUST come on because you hit a specific temperature. The PCM manages the engagement of the fan. Oh and you should consider at least plugging your EGR valve back in to fully engage the fan. See the thread below for more information.

--> LINK <---

[tom anderson]

The EGR valve is installed in the hole and plugged in. When I deleated the EGR I just plugged off the hole in the up-pipe. I have an Edge Evolution installed on the truck is there any way to program the fan through this unit?

[a2elvis]

So Im trying to wrap my head around this... The EGR being deleted changes fan clutch engagement? Isnt fan clutch engagement based on ECT?

[tom anderson]

I read the attached link and it appears that it discusses tuning more than anything else. I gues I just need some basic information as to what basic temperature that the fan is to engage and how to test it's function. As I stated earlier I don't ever remember hearing the fan engage, even before the EGR delete. What I'm worried about is high temperatures when I start hauling during the summer. I would prefer to nip this potential problem now than later on the side of the road waiting for it to cool down.

[headviking]

Turn the A.C on and the fan should come alive.

[Lilpooh]

Like Evil Eye said, it's not only the temp of the coolant but a variety of sensors that make the fan clutch come on.

Read post #2 that Bismic posted on this link.
Easy Fan Clutch question

[Evil Eye]

Originally Posted by a2elvis

So Im trying to wrap my head around this... The EGR being deleted changes fan clutch engagement? Isnt fan clutch engagement based on ECT?

On some PCM strategies it appears so, although I don't know if it is just the PCM strategy or aftermarket tuning that is responsible. Removing my EGR valve limited my boost to 20 psi just like in the thread I linked to. It had no change on my fan clutch engagement, though. I am starting the rationalize that there are certain parameters that are hard coded into the PCM which cannot be overwritten with aftermarket tuning OR that specific strategies on the PCM use additional parameters to make decisions with respect to boost levels and EGR valve position.

Originally Posted by tom anderson

I read the attached link and it appears that it discusses tuning more than anything else. I gues I just need some basic information as to what basic temperature that the fan is to engage and how to test it's function. As I stated earlier I don't ever remember hearing the fan engage, even before the EGR delete. What I'm worried about is high temperatures when I start hauling during the summer. I would prefer to nip this potential problem now than later on the side of the road waiting for it to cool down.

Moral of the story - Some PCM's appear to limit fan engagement when you disconnect your EGR valve. We haven't seemed to pinpoint the exact reasons (PCM strategy, specific model year, specific tuning, etc). Try plugging your EGR valve back in and zip tie it out of the way and see if that helps.

PS. Some folks have never heard their fan clutch engage although that doesn't mean that they have a problem, although your temps were pretty high and I would have expected your fan to have come on.

[nylyon]

My fan doesn't really come on either and my coolant temps will reach 225. I hoped to find someone in my area who has an AE so we can run some fan tests, but I haven't found anyone yet.

[Evil Eye]

Originally Posted by nylyon

My fan doesn't really come on either and my coolant temps will reach 225. I hoped to find someone in my area who has an AE so we can run some fan tests, but I haven't found anyone yet.

I have mine and can fly out at any time!

I'm hoping that these kinds of threads and discussion will give us some definitive answers concerning the PCM programming. It will certainly help us advise others once we have better information.