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Has anyone had any experience installing the Range AFM disabler. It now has the ability to also eliminate the stop start function. I was thinking of getting one for my 2017 XT5 and want to see if anyone has installed one and how well it is working.
 

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2018 XT5 Luxury, Stellar Black Metallic w/ Black Ice Package
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I have the Range AFM Disabler installed and so far it is working out great. I too will post more on it when I have a little more time on it. If anyone is thinking about doing this you need the latest version (V8.6R1) for the stop/start disable feature.
 

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I have the Range AFM Disabler installed and so far it is working out great. I too will post more on it when I have a little more time on it. If anyone is thinking about doing this you need the latest version (V8.6R1) for the stop/start disable feature.
If someone would let me know what the Range AFM Disabler does, I sure would appreciate it. Thanks in advance.
Bob
 

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07 CTS(Sold) 07 Escalade(Sold) 17 Buick Envision, 17 ZL1 Camaro, 18 XT5 Premium/Lux
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If someone would let me know what the Range AFM Disabler does, I sure would appreciate it. Thanks in advance.
Bob
Hi RobertNM check out the following thread "Possible new auto start/stop disable method found." There is a detailed review of what the Range AFM disabler does and opinions owners using it on their XT5's.
 

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Let me suggest that all future comments regarding The Range AFM disabler be posted on this thread rather than the "Possible new auto start/stop disable method found." thread. I am interested in the comments of actual users and this thread has the appropriate title. Let me ask, if an XT5 owner had no concern with the "V4" icon occasionally illuminating, would the Range AFM Disabler be a good way to eliminate stop/start? If so, would there be additional benefits or drawbacks?
 

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Let me suggest that all future comments regarding The Range AFM disabler be posted on this thread rather than the "Possible new auto start/stop disable method found." thread. I am interested in the comments of actual users and this thread has the appropriate title. Let me ask, if an XT5 owner had no concern with the "V4" icon occasionally illuminating, would the Range AFM Disabler be a good way to eliminate stop/start? If so, would there be additional benefits or drawbacks?

Arminius, I would have to say yes to this, only because their are no perceived downsides to using the Range device (that we know of). No issues with Remote Start, possible battery issue, no possible effect on safety systems and simple removal for service if needed. The only drawback I can see at this time is the price of the unit and its possible longevity. IMHO

Not to digress but I would also like to mention those with access to an HPTuners unit can deactivate AFM (but not stop/start yet). The XT5 is one of the supported vehicles. This would eliminate the need for an external device to be plugged into the OBD2 port all the time. But with that said this is something I think would be better left to the pros.
 

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Thank you.
Bob
If you are interested in further detail, take a look at the FAQ's on the Range website. They do recommend removal of the device for a period of time before an emission test to make certain all codes, if any, are aged and deleted.
 

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This site says you may get some oil smoking, as follows:
"An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. It prevents the computer from switching over to four-cylinder mode. It’s a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound.
NOTE: A disabler device should ONLY be used if the valvetrain is in good working order.
Engines with AFM use a high-volume oil pump. When you eliminate the AFM system, the extra oil is no longer needed. Excess oil will be pushed out of the pressure relief valve into the oil pan. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines." "On All Cylinders, an auto blog",
https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-engines/
GM Authority says there is a MPG benefit to be lost: "The primary benefit of Cylinder Deactivation/AFM is higher fuel economy without downsizing engines. The technology can improve fuel economy by up to 12 percent without sacrificing performance.
Read more: http://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-active-fuel-management-cylinder-deactivation-technology/#ixzz5jKVh7TcF"

I stripped a motorcycle oil pump drive gear once by revving it out when cold because it sounded good and there was an audience. A consumer protection department in an adjoining office handled multiple claims for broken oil pump drive shafts after a "Quickie" type oil change shop tapped a barrel of gear oil and put it in consumers' crankcases. GM had big problems with cylinder deactivation in the '80s. I guess I would tread with care. These devices could put your expensive engine in play rather than just your oversized battery.
 

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This site says you may get some oil smoking, as follows:
"An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. It prevents the computer from switching over to four-cylinder mode. It’s a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound.
NOTE: A disabler device should ONLY be used if the valvetrain is in good working order.
Engines with AFM use a high-volume oil pump. When you eliminate the AFM system, the extra oil is no longer needed. Excess oil will be pushed out of the pressure relief valve into the oil pan. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines." "On All Cylinders, an auto blog",
https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-engines/
GM Authority says there is a MPG benefit to be lost: "The primary benefit of Cylinder Deactivation/AFM is higher fuel economy without downsizing engines. The technology can improve fuel economy by up to 12 percent without sacrificing performance.
Read more: http://gmauthority.com/blog/gm/general-motors-technology/general-motors-propulsion-technology/general-motors-active-fuel-management-cylinder-deactivation-technology/#ixzz5jKVh7TcF"
I question the theory that disabling AFM causes oil consumption issues or burning. If you google around even more, you'll see people using the Range Technology disabler to successfully improve their oil consumption because when a cylinder shuts down, it causes oil "blow by" and excessive oil build up on the bottom of deactivated pistons. When they aren't working, they cool down and cook the oil onto the rings. Keeping all cylinders working all the time allows all components to be doing their jobs and the oil stays where it's supposed to. (so this is the exact opposite of what your article above states) I'm reading that people are seeing less gunk and reporting less issues after disabling their AFM. I'm not stating that their theories are right, and the articles you posted are wrong, I think it's just one of those things that's hard to prove - too many factors involved.

We also need to remember that the XT5 is a daily driver "family" car. Not a 6.2 V8 truck or a high performance sports car.
Does anyone tow with their XT5? (I'm sure somebody out there does and they'll jump all over me ..) but I don't tow anything with mine. I don't have custom exhaust or tuning ... Mine is a pavement princess that doesn't ever have to work under load or heavy conditions. It wasn't built for that anyway, but I'm just saying. I'll be keeping an eye on my oil consumption when using the Range disabler, but I'm honestly not very concerned about it causing oil issues. If it does, I'll let you know.

The oil consumption debate has apparently been going on since AFM started showing up on the scene and there's many, many different and opposing theories out there.

I'll post my full commentary after I've had the Range in place for a little while longer... so far I'm in the honeymoon period with it and I want to see if that continues.

As far as the article from GM Authority stating the benefits of AFM on fuel mileage, sorry but I can't buy that either. It sounds like GM kool-aid.
A little more Googling can show all about the problems people have with AFM technology, bad lifters, etc. Gas mileage isn't so important after the engine blows itself out.
Sorry if it sounds like I'm arguing, that's not my intention. But as with everything, there's always 2 sides to consider.

Your insight is always articulate and I appreciate your opinions even if we don't agree.
 

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As far as the article from GM Authority stating the benefits of AFM on fuel mileage, sorry but I can't buy that either. It sounds like GM kool-aid.
Is AFM, or any cylinder deactivation technology, another of the CAFE credits applied and not actually tested by the EPA?

It certainly does not help for highway mileage because it never activates in the XT5 at highway speeds. Along those lines, the oil consumption theory for disabling AFM would loose credibility because it does not activate whenever driving on the highway.
 

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A quick couple of comments:

njacobsen: I would suspect that you are correct in your assumption that using a product such as HPTuners would leave a footprint that GM could discover. I have seen the process on one of my friends Corvettes. He pulls up a fuel management menu, under that menu is a drop down box that AFM is either selected or not. Unselecting this option requires the ecm to be flashed. I would imagine that this would also upgrade the flash counter for the ecm and set off a red flag to GM. Obviously they know exactly how many times your ECM has been flashed for TSM's or updates. Questions is how deep they would pursue it. Personally, this is an avenue I would not use. Also, so far this change only effects AFM and not stop/start.

AFM: At one point I owned a 07 Cadillac Escalade 6.2 L92 non AFM vehicle. I put lots of miles on it and never (other then an airbag issue) had any problems with it. My brother 2 years later bought an Escalade with the 6.2 L94 AFM equipped engine. From the time he had approx 25000 miles on the clock it spent a number of visits to the Cadillac dealer for lifter issues and increased oil use. The interesting thing is my 07 ran stronger, was smoother and got about the same fuel economy. He sold it after that and has left the Cadillac brand.

Oil usage, pump and lifter issues with a possible delete: I would say this is a non issue. Think about it, AFM is not used on the open highway, so, then why are we not causing issues to our engines whenever they are not in the V4 mode. If anything I would believe the opposite is true, cylinder deactivation will cause uneven head and block temperatures between the active and inactive cylinders. An active cylinder will have a combustion chamber temperature of approx 600C, an inactive one approx 100C. That's a major difference. I would also support the theory that accelerated ring glazing may also occur as well as additional oil consumption from blow by. There would be crankcase pressure but no valve restriction that would allow more oil to sneak past the rings on deactivated cylinders and into the exhaust stream.

IMHO, and unless someone can provide some concrete arguments or proof I see no reason NOT to disable AFM on our XT5's. :)
 

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I'm extremely pleased with the Range disabler thus far.
Interestingly, the 3rd gear lagging feeling I've been complaining about ad-nauseam is greatly improved.
With the disabler plugged in and V6 constantly engaged, the poor performance around 2nd/3rd gears that I was really bothered by is almost unnoticeable. However, the loud weedwacker engine noise between approx 15-35 mph is still happening. I know it's probably not, but I can't help but think this silly sounding engine ruckus is being piped in - it's almost too contrived to be real. But I digress.

Anyway, the car is much more pleasant to drive on trips in town. No stop/start makes me very, very happy. I feel like if I have to keep this car for another 3-4 years, I can feasibly do so as long as the disabler is plugged in. Plus, my dog likes riding in the XT5 so that's one benefit to keeping it.
Fuel mileage seems exactly the same, so no complaints there.
 

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I know it's probably not, but I can't help but think this silly sounding engine ruckus is being piped in - it's almost too contrived to be real. But I digress.
In a manner of speaking, you are correct that noise is piped in. The ANR will reduce engine noises electronically using the sub-woofer by introducing a 180 degree out of phase replica of the noises. Have you brought this to the attention of your dealer? Perhaps they can test, calibrate, or replace components associated with the ANR to cause it to do what it is supposed to do. I do not believe there is a way to turn off the ANR, even with the radio off. Perhaps the dealer can turn it off for you to try.

Be sure to unplug your Range disabler before the dealer visit just to eliminate the probability of dealer questions or reluctance to diagnose your issues.
 

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In a manner of speaking, you are correct that noise is piped in. The ANR will reduce engine noises electronically using the sub-woofer by introducing a 180 degree out of phase replica of the noises. Have you brought this to the attention of your dealer? Perhaps they can test, calibrate, or replace components associated with the ANR to cause it to do what it is supposed to do. I do not believe there is a way to turn off the ANR, even with the radio off. Perhaps the dealer can turn it off for you to try.

Be sure to unplug your Range disabler before the dealer visit just to eliminate the probability of dealer questions or reluctance to diagnose your issues.
If they could turn it off, or even just calibrate it to sound less ridiculous, that would be great.
Am I the only one noticing it?
My neighbor is a technician at the local Cadillac dealership, he and I took it for a ride in his off time. He said "they all sound this way" *shrug*
Not what I wanted to hear. But I'll formally take it in - complaining about it doesn't seem to make it go away. (I keep hoping but no dice)

I can't imagine the dealer will be as impressed with the Range as I am, so I'll definitely be leaving it at home.
 
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