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Range D.F.M. disabler

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Puttnutt24 Enthusiast

Puttnutt24

Posted
Posted
On 8/24/2020 at 8:17 AM, Stephen L. Pannell said:

well, almost 2 weeks have gone by and I have driven right at 500 miles and many start stops along the way. So far the AFM/DFM unit has worked to perfection. NO codes have been thrown and  the automatic start stop is no longer a PITA. As for fuel mileage I can't tell since most of the driving has been in town. I still average around 15 mpg in town driving.  2019 High Country 6.2l 4x4 crew

Steve, which transmission do you have?

Thanks..

Rich

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Bob Ross
Bob Ross

There are plenty of threads on this but for me I paid for a V8 and I want a V8. Besides the fact that AFM was plagued with lifter failures and oil consumption issues. The people who had their engine i

Stephen L. Pannell
Stephen L. Pannell

So I went ahead and picked up one from Summit Racing near me and plugged it in. Started and drove about 30 miles and so far it's working like it should. V8 sound all the time. With the Borla catback e

JohnTz
JohnTz

Ok thanks for the explanation. I guess I knew that it had DFM when I purchased it so I knew it was a V8 that has advanced cylinder fuel management so it doesn’t bother me and it equals better fuel mil

Coles5515 Enthusiast

Coles5515

Posted
Posted
1 hour ago, Stephen L. Pannell said:

10 speed

Steve- what version do you have? Should say on the unit. I have the 6.2 with 10 speed and cannot STAND the STUPID F’ing on off drop down cylinders etc. Damnit I bought a V8! I want all damn 8 all the time. 

Stephen L. Pannell Enthusiast

Stephen L. Pannell

Posted
Posted (edited)

Not sure but I bought it at Summit Racing in Arlington Texas. 520 mile road trip this past weekend running 75-85 and averaged 20 mpg. I now have about 1500 miles on it and all good so far.

Edited by Stephen L. Pannell
  • Like 1
Puttnutt24 Enthusiast

Puttnutt24

Posted
Posted
On 9/7/2020 at 7:27 AM, Stephen L. Pannell said:

Not sure but I bought it at Summit Racing in Arlington Texas. 520 mile road trip this past weekend running 75-85 and averaged 20 mpg. I now have about 1500 miles on it and all good so far.

Well Steve, I hope I have the same success as you. I have a '20 6.2 w/10spd and i just ordered unit RA003B, I'll be plugging it in the moment I take deliver of the truck next week..

Thanks for researching this and trying it out..

Rich

Coles5515 Enthusiast

Coles5515

Posted
Posted
5 hours ago, Puttnutt24 said:

Well Steve, I hope I have the same success as you. I have a '20 6.2 w/10spd and i just ordered unit RA003B, I'll be plugging it in the moment I take deliver of the truck next week..

Thanks for researching this and trying it out..

Rich

Please let us know your results 

  • 2 months later...
Mudcon Enthusiast

Mudcon

Posted
Posted

I beta tested them also, mine is a 10 speed and I had to stop using it. Made my transmission do weird shifts.

bjr2020 6.2 Enthusiast

bjr2020 6.2

Posted
Posted (edited)
On 12/10/2020 at 1:25 PM, Mudcon said:

I beta tested them also, mine is a 10 speed and I had to stop using it. Made my transmission do weird shifts.

Same here it wasn’t so much the weird shifts with mine it just caused my tranny to shift odd on the first startup of the day. The biggest issue was with my truck a 20 6.2 10 speed tb custom that the range does not deactivate all the dfm modes it does disable dfm a majority of the time but at cruising speed and certain gears you could hear that dfm was not disabled in all circumstances. I have a muffler delete so you could def tell. I talked with range and sent it back and bought the pulsar lt which does indeed disable dfm. The range seems to work flawlessly on most setups besides the 6.2 10 speed and possibly the 5.3 10 speed from what I’ve heard.Just my 2 cents.

Edited by bjr2020 6.2
Mudcon Enthusiast

Mudcon

Posted
Posted
On 12/11/2020 at 10:47 PM, bjr2020 6.2 said:

Same here it wasn’t so much the weird shifts with mine it just caused my tranny to shift odd on the first startup of the day. The biggest issue was with my truck a 20 6.2 10 speed tb custom that the range does not deactivate all the dfm modes it does disable dfm a majority of the time but at cruising speed and certain gears you could hear that dfm was not disabled in all circumstances. I have a muffler delete so you could def tell. I talked with range and sent it back and bought the pulsar lt which does indeed disable dfm. The range seems to work flawlessly on most setups besides the 6.2 10 speed and possibly the 5.3 10 speed from what I’ve heard.Just my 2 cents.

So the pulsar  is flawless with your 6.2 and 10 speed?    Did if affect your fuel milage?  The range reduced my fuel milage about 3-4mpg.

josh_range New Member

josh_range

Posted
Posted
On 12/11/2020 at 9:47 PM, bjr2020 6.2 said:

Same here it wasn’t so much the weird shifts with mine it just caused my tranny to shift odd on the first startup of the day. The biggest issue was with my truck a 20 6.2 10 speed tb custom that the range does not deactivate all the dfm modes it does disable dfm a majority of the time but at cruising speed and certain gears you could hear that dfm was not disabled in all circumstances. I have a muffler delete so you could def tell. I talked with range and sent it back and bought the pulsar lt which does indeed disable dfm. The range seems to work flawlessly on most setups besides the 6.2 10 speed and possibly the 5.3 10 speed from what I’ve heard.Just my 2 cents.

Jumping in to clarify on what was said here. Our AFM/DFM Disabler does not and will not officially work for 2019+ 6.2 10-speed trucks. Some customers have ran our Disabler on their 6.2 10-speed trucks without any issues, and some reported issues with fluctuation in revs when at cruising speeds. This is the result of coding limitations that are posed by the module accessing the ECU via OBD port, hence why it can be disabled successfully with the Pulsar LT working as an inline module. 

 

As for Mudcon's question about fuel economy, it completely depends on your driving style. Some users see no change, some see better MPGs, some see worse. With the increased throttle response that this product provides, it's pretty easy to become a leadfoot. ?

  • 3 weeks later...
one_day_you_may Enthusiast

one_day_you_may

Posted
Posted (edited)

I’m on my second Range device on a 20 5.3 and a few times a week the auto start stop will happen with the device plugged in. Not sure why. I unplug the unit and plug it back in, it doesn’t do it again for a day or so then it happens again. Really strange since this has happened with 2 devices. 

Edited by one_day_you_may
Tigerwitha88 Enthusiast

Tigerwitha88

Posted
Posted
On 12/29/2020 at 9:25 PM, one_day_you_may said:

I’m on my second Range device on a 20 5.3 and a few times a week the auto start stop will happen with the device plugged in. Not sure why. I unplug the unit and plug it back in, it doesn’t do it again for a day or so then it happens again. Really strange since this has happened with 2 devices. 

Mine does same. On average once every couple weeks and always when engine not fully warm and the first stop, wont do it again after. I just leave it in. Called range and they mentioned it may happen every now and then but is still deactivating the DFM. 

Gwill30 Enthusiast

Gwill30

Posted
Posted

Is the pulsar LT the only option available for a 21 6.2 10speed?

 

I really just want to disable the DFM and don't need the other bells and whistles for an extra 250.00

  • 6 months later...
mjsitek New Member

mjsitek

Posted
Posted

Purchased the Range model RA003R AFM / DFM device for my 2021 Silverado with the 5.3L V8 and 8-speed transmission. The device did effectively deactivate the start / stop function, however, DFM was still active when driving under 40 MPH. I put a rough country exhaust system on the truck, and you can audibly hear the drone when it drops cylinders. You can also feel the added hesitation when it switches between DFM and full V8 mode. I sent it back to Range and they exchanged the module for a new one. After plugging in the replacement module, it works only every other time I start the vehicle. Called customer service again and they have no explanation, except in rare occasions it just won't work on your vehicle. They did offer to sell me the new $500 Pulsar module instead (at full price, of course). Not happy with this purchase, or the support from Range. Wondering if anyone else has had a similar experience? I will never purchase another product from this company.

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