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Old 01-03-2021, 03:50 PM   #1
DeadheadNM
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Anyone tried a disabler for active fuel management?

Curious if thereís a benefit at all with use of one of these diablers. Has anyone tried these or similar?

https://www.rangetechnology.com/prod...-dfm_disabler/
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Old 01-03-2021, 04:06 PM   #2
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Re: Anyone tried a disabler for active fuel management?

I have had 1 in my 2012 chevy Silverado since buying it new.No problems and it doesn't go into cylinder deactivation.
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Old 01-03-2021, 09:29 PM   #3
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Re: Anyone tried a disabler for active fuel management?

Thanks Mark. Did this improve performance at all or impact gas mileage?
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Old 01-04-2021, 09:25 PM   #4
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Re: Anyone tried a disabler for active fuel management?

I bought the Diablo tuner instead. Not much more money and several more features. You can get them refurbished at a good price, see the link.

https://www.ebay.com/itm/RFB-DiabloS...STRK:MEBIDX:IT
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Old 01-05-2021, 04:34 PM   #5
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Re: Anyone tried a disabler for active fuel management?

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Thanks Mark. Did this improve performance at all or impact gas mileage?
All it did was disable AFM and that is all I wanted it to do. It has worked for 8 years without issue or causing problems.
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Old 01-05-2021, 04:38 PM   #6
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Re: Anyone tried a disabler for active fuel management?

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I bought the Diablo tuner instead. Not much more money and several more features. You can get them refurbished at a good price, see the link.

https://www.ebay.com/itm/RFB-DiabloS...STRK:MEBIDX:IT
When I bought my Range AFM disabler my Silverado was under warrantee for 6 years so I didn't want to risk any issues with warrantee. I know you can load the stock map back in but all I wanted to do was disable the AFM and I think I got mine for $60-80 on sale.

With that being said the Diablo has tons of great features. I would probably destroy something messing with the wrong file.
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Old 01-06-2021, 12:37 PM   #7
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Re: Anyone tried a disabler for active fuel management?

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When I bought my Range AFM disabler my Silverado was under warrantee for 6 years so I didn't want to risk any issues with warrantee. I know you can load the stock map back in but all I wanted to do was disable the AFM and I think I got mine for $60-80 on sale.

With that being said the Diablo has tons of great features. I would probably destroy something messing with the wrong file.
I'm trying to be careful with the settings. I have been running one of the preset tunes with the AFM turned off and adjusted for tire size. I plan to get a custom tune from https://www.diablewtune.com/ sometime soon. Just trying to decide if I want to add headers and exhaust first.
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Old 01-06-2021, 09:34 PM   #8
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Re: Anyone tried a disabler for active fuel management?

Thanks guys. My 2019 burb is still under warranty so am mindful of that.
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Old 01-07-2021, 01:25 AM   #9
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Re: Anyone tried a disabler for active fuel management?

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Thanks guys. My 2019 burb is still under warranty so am mindful of that.
Pete, I know a lot of the Camaro guys who arenít cammed or tuned run the range unit. Mine still has afm and I actually get better mpg with it disabled than with it active. On the Camaroís when you use the paddle shifters on the steering wheel, the computer automatically disables AFM so Iíve been able to test the mileage against each other pretty frequently.

That said, the day is coming sooner than later that Iím gonna cam it and be done.
Iím sure you already know but on the direct injected gen 5 engines, you gotta watch the carbon buildup on the intake valves. They have had some troubles there. A catch can is a great investment to help keep the valves clean.
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Old 01-07-2021, 08:32 AM   #10
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Re: Anyone tried a disabler for active fuel management?

Tyler that helpful info. Thanks. If it’s the case I may get better mpg or save wear on the engine than I’ll jump on a disabler. I know next to nothing about this gen motor. I’ll check into a catch can too.
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Old 01-07-2021, 09:57 AM   #11
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Re: Anyone tried a disabler for active fuel management?

In my opinion your money ahead to get it disabled. I haven’t messed with any of the Gen 5 stuff but I know the lifters in the Gen 4 AFM systems are notorious for failure, often times wiping the cam with the failed AFM lifter.
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Old 01-07-2021, 10:50 AM   #12
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Re: Anyone tried a disabler for active fuel management?

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In my opinion your money ahead to get it disabled. I havenít messed with any of the Gen 5 stuff but I know the lifters in the Gen 4 AFM systems are notorious for failure, often times wiping the cam with the failed AFM lifter.
Yep. Last week I spoke w a guy who had similar first hand experience w this and thatís what sent me along this path. Youíd think after many decades of engineering experience BS like this wouldnít happen and a motor could reliably clock 300k miles.
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Old 01-07-2021, 07:53 PM   #13
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Re: Anyone tried a disabler for active fuel management?

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Yep. Last week I spoke w a guy who had similar first hand experience w this and thatís what sent me along this path. Youíd think after many decades of engineering experience BS like this wouldnít happen and a motor could reliably clock 300k miles.
Yes sir, I know exactly what you mean, itís a gimmick and nothing more in my opinion. Weíve been looking at newer suburbans lately and Iím dreading dealing with it too. The Camaro only gets a couple thousand miles a year so itís not a huge hurry to get it resolved. My wife is going to get the Suburban when we pull the trigger and itís going to be her daily, so there will be a lot more haste in getting it disabled or deleted. Iíd like to just delete it but to get to the lifters, the heads have to come off.
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