DFM disabler released

fondupot · Nov 29, 2024

Antonm said:
The Range unit works fine, just disappointed to know that its not actually a DFM disabler, its more of a DFM condition modifier it would seem because DFM still happens on decel.
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I just installed mine today. I'm happy with it. I didn't notice the 0-cylinder on decel tho (before or after the unit). I am just happy to have AutoStop turned off, and AFM/DFM turned off when cruising in Drive. Before I could feel AFM/DFM kick in and there was a flutter/vibration accompanied. Now that is gone.

jfoj · Dec 2, 2024

Just so everyone is aware, and Range did not have this info on their website in the description, when the Range 007 device is plugged in the Evap and O2 Sensor Emission Readiness Monitors will not become Ready. So if you live in an area that requires Emission Testing, you will need to remove the Range module for the Emission Readiness Monitors to fully become Ready prior to Emission Inspection, otherwise you will not pass an Emission Test. This is based on OBDII Emission Inspections.

I emailed Range and they confirmed this is the case, but again, nothing on their Website about the Readilness Monitors. Unclear if this will impact OBDII codes from triggering in the future, unclear if OnStar monitoring will pick this up. Based on the price point, this is clearly some form of Spoof module rather than a sophisticated microprocessor that alters the data stream the inhibit AFM.

So BEWARE, you WILL NEED TO REMOVE the Range device prior to Emission Testing.

Overall I am fairly happy with the performance of the module, but so far I only have about 300 miles using it.

KMeloney · Dec 2, 2024

jfoj said:
Just so everyone is aware, and Range did not have this info on their website in the description, when the Range 007 device is plugged in the Evap and O2 Sensor Emission Readiness Monitors will not become Ready. So if you live in an area that requires Emission Testing, you will need to remove the Range module for the Emission Readiness Monitors to fully become Ready prior to Emission Inspection, otherwise you will not pass an Emission Test. This is based on OBDII Emission Inspections.

I emailed Range and they confirmed this is the case, but again, nothing on their Website about the Readilness Monitors. Unclear if this will impact OBDII codes from triggering in the future, unclear if OnStar monitoring will pick this up. Based on the price point, this is clearly some form of Spoof module rather than a sophisticated microprocessor that alters the data stream the inhibit AFM.

So BEWARE, you WILL NEED TO REMOVE the Range device prior to Emission Testing.

Overall I am fairly happy with the performance of the module, but so far I only have about 300 miles using it.

I always suspected this was the case (and knew I had to remove the Range unit I used in my '09 Tahoe prior to emissions), but thanks for confirming. This has me leaning harder toward the Carbyte unit.

If the Carbyte unit kicked in immediately -- not only after reaching 40 mph -- it'd be an absolute-no brainer for me.

jfoj · Dec 2, 2024

While the Range 007 is not as easy to plug in and out as and OBDII adapter, it is still not very hard to install and remote. On my 2024 Yukon with 22" wheels, I did not need to remove the drivers side wheel, just like 6 small screws for the inner fender liner and pull it out of the way. If you have the proper tools in hand, under 10 minutes would be about the time it would take to remove/install.

Antonm · Dec 2, 2024

I was all jazzed when Range Technology , a division of Holley, one of the biggest names in the automotive aftermarket, finally came out with this device. I ordered one up basically a week after they came out (and they were already on backorder at the time).

But between them leaving on the 0 cylinder part of DFM on/ functioning (making the device a DFM schedule modifier and NOT a DFM disabler) and now the O2 sensor not ready flaw, I'm way disappointed with it.

I emailed them just prior to Thanksgiving requesting a return/ refund because the device isn't a DFM disabler. They did respond to the email saying I should hear something from Holley in a few days, so we'll see if that happens (haven't heard anything yet, but Thanksgiving may have delayed their response. Below is a screenshot of their most recent return email.

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Kpwweb · Dec 2, 2024

Antonm said:
I was all jazzed when Range Technology , a division of Holley, one of the biggest names in the automotive aftermarket, finally came out with this device. I ordered one up basically a week after they came out (and they were already on backorder at the time).

But between them leaving on the 0 cylinder part of DFM on/ functioning (making the device a DFM schedule modifier and NOT a DFM disabler) and now the O2 sensor not ready flaw, I'm way disappointed with it.

I emailed them just prior to Thanksgiving requesting a return/ refund because the device isn't a DFM disabler. They did respond to the email saying I should hear something from Holley in a few days, so we'll see if that happens (haven't heard anything yet, but Thanksgiving may have delayed their response. Below is a screenshot of their most recent return email.

View attachment 443946
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Obviously this is up to you. On a Z71 I do not have the problem of 0 DFM—all cylinders are still active and do slow me down on hills, much like if the truck were a manual and I used the engine and transmission to slow me down. Even happens on the highway downhill. Most of the time the truck will maintain the same speed instead of accelerating. Further, I can feel the transmission downshift and the engine hold me back when braking for a light.

I am very pleased with the Range and even the thought of potentially avoiding lifter failue in the future (already had one failed set) makes me giddy.

To each their own.

Antonm · Dec 2, 2024

Kpwweb said:
Obviously this is up to you. On a Z71 I do not have the problem of 0 DFM—all cylinders are still active and do slow me down on hills, much like if the truck were a manual and I used the engine and transmission to slow me down. Even happens on the highway downhill. Most of the time the truck will maintain the same speed instead of accelerating. Further, I can feel the transmission downshift and the engine hold me back when braking for a light.

I am very pleased with the Range and even the thought of potentially avoiding lifter failue in the future (already had one failed set) makes me giddy.

To each their own.

Why do you think the Range device will "potentially avoid lifter failure" when it still has the DFM functioning during the 0-Cylinder mode (which is literally every time you drive the vehicle and come to a stop)??? Having the 0-Cyilder part of DFM still enabled totally negates any potential lifter saving or reduced failure it might have.

Basically the one and only thing its good for is making consistent exhaust sounds for those with modified exhaust systems. Which I guess if that's something you care about then sure, the range tech device works fine.
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KMeloney · Dec 2, 2024

Antonm said:
Basically the one and only thing its good for is making consistent exhaust sounds for those with modified exhaust systems.

There's no improvement in acceleration and transmission smoothness with the Range? Geez. Sounds like a complete waste then.

Antonm · Dec 2, 2024

KMeloney said:
There's no improvement in acceleration and transmission smoothness with the Range? Geez. Sounds like a complete waste then.

No, not in an otherwise stock vehicle there isn't anyway. Our 6.2 High Country Tahoe didn't have any acceleration or transmission smoothness issues before the Range Tech device.

Before the Range Tech device, if you turned the radio off, and told the kids to be quite, you might, maybe, be able to tell when it deactivated cylinders if you tried real hard, and even then it was a maybe. I'm sure with an aftermarket exhaust it would be much more noticeable, but the stock exhaust is pretty dang quite.

And I agree with your last statement, it is a complete waste IMHO, unless you have a louder aftermarket exhaust, and the sound of the cylinder deactivation bothers you.

If Range Tech would make an actual DFM disabler (you know, something that just turns the dang DFM off, like how hard its that, just turn it off), then I would be first in line to get one.
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jfoj · Dec 2, 2024

KMeloney said:
There's no improvement in acceleration and transmission smoothness with the Range? Geez. Sounds like a complete waste then.

I would say there is an improvement in acceleration and transmission smoothness, or at least not having the engine hunting and turning cyclinders back on during tip in throttle and acceleration. This then equates to less or no transmission hunting as well.

I am still not sure about the "0" cylinder on deceleration, I can say it appears that there is Fuel Cut Off on deceleration, this has been used for years on GM and other manufacturers. My 2006 6.0 Yukon Denali has Fuel Cut Off on deceleration. I would watch the engine temperature drop quite a bit on my Ultra Gauge while engine braking down the PA mountains in the Winter. When you pump cold air thru the engine with no fire in the holes, the engine temp would drop 30-40 degrees depending on hold long the downhill grade was.

DFM disabler released

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