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#1 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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Anyone tried a disabler for active fuel management?
Curious if there’s 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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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#2 |
Senior Member
Join Date: Jun 2007
Location: Pine Ridge Florida
Posts: 4,125
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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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Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205 |
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#3 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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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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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#4 |
Registered User
Join Date: Apr 2010
Location: Oregon
Posts: 1,184
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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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1951 Truck, LS1/4L60 1964 Suburban, current project 2014 Silverado daily driver 1953 Westerner "canned ham" trailer, rebuilt 1974 Prowler trailer, rebuilt |
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#5 |
Senior Member
Join Date: Jun 2007
Location: Pine Ridge Florida
Posts: 4,125
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Re: Anyone tried a disabler for active fuel management?
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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Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205 |
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#6 | |
Senior Member
Join Date: Jun 2007
Location: Pine Ridge Florida
Posts: 4,125
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Re: Anyone tried a disabler for active fuel management?
Quote:
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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Click on my Not really a build thread, yet NOT SO RUST FREE RUST FREE BLAZER LS ENGINE SWAP INFORMATION THREAD BOLT RESTORATIONS 4l60 to an NP205 |
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#7 | |
Registered User
Join Date: Apr 2010
Location: Oregon
Posts: 1,184
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Re: Anyone tried a disabler for active fuel management?
Quote:
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1951 Truck, LS1/4L60 1964 Suburban, current project 2014 Silverado daily driver 1953 Westerner "canned ham" trailer, rebuilt 1974 Prowler trailer, rebuilt |
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#8 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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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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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#9 | |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,404
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Re: Anyone tried a disabler for active fuel management?
Quote:
That said, the day is coming sooner than later that I’m gonna cam it and be done. I’m 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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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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#10 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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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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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#11 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,404
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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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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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#12 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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Re: Anyone tried a disabler for active fuel management?
Yep. Last week I spoke w a guy who had similar first hand experience w this and that’s what sent me along this path. You’d think after many decades of engineering experience BS like this wouldn’t happen and a motor could reliably clock 300k miles.
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1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#13 |
All about them K’s
![]() Join Date: Jun 2014
Location: Land of Entrapment
Posts: 6,404
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Re: Anyone tried a disabler for active fuel management?
Yes sir, I know exactly what you mean, it’s a gimmick and nothing more in my opinion. We’ve been looking at newer suburbans lately and I’m dreading dealing with it too. The Camaro only gets a couple thousand miles a year so it’s not a huge hurry to get it resolved. My wife is going to get the Suburban when we pull the trigger and it’s going to be her daily, so there will be a lot more haste in getting it disabled or deleted. I’d like to just delete it but to get to the lifters, the heads have to come off.
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Tyler '57 3100 http://67-72chevytrucks.com/vboard/s...d.php?t=813888 '72 K20 Cheyenne: 5” lift, 35’s, front dana 60 blah blah blah… http://67-72chevytrucks.com/vboard/s...d.php?t=662879 ‘69 K10 SWB: 4” lift 33”s… in a million pieces http://67-72chevytrucks.com/vboard/s...d.php?t=805206 '98 Silverado LT K2500HD ECLB Vortec 454/4l80E: 6" lift 35x12.5x20’s |
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#14 |
Registered User
![]() Join Date: Feb 2003
Location: Mulvane, Ks.
Posts: 754
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Re: Anyone tried a disabler for active fuel management?
Needing to replace a vehicle that was totaled out. Looking at purchasing an older Tahoe if I can find one in my price range. I want to stay away from the afm if can.
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#15 |
Born Psycho
![]() Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,889
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we have seen several AFM lifter failures at the shop where i work, usually right around 100 K and yes it wipes out the cam too-permanent cylinder deactivation is what we call it. Jasper sells a calif legal engine with normal lifters on all 8 cylinders, it comes with a program to download in the vehicles computer so the CE light wont come on, it comes with an executive order number (calif smog legal crap) so it will pass cali emissions test. our smog machines will pick up any tune that has been installed-even if it has been removed it still leaves a "fingerprint" on the vehicles computer. you guys that live where you can still have fun with your vehicles are lucky.
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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#16 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
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Re: Anyone tried a disabler for active fuel management?
Thanks for the follow-up. I never went ahead with an AFM bypass and maybe I should re-visit this issue soon. I'd like the burb to last for a long time.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#17 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
|
Re: Anyone tried a disabler for active fuel management?
At 58k miles I finally got a catch can installed. Thanks Tyler.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#18 |
Registered User
Join Date: Jun 2006
Location: massachusetts
Posts: 127
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Re: Anyone tried a disabler for active fuel management?
Afm delete works but I would think the mechanism should be exercised once in a while. Although not using it is the goal.
Last edited by pamoffa; 09-07-2024 at 09:20 PM. |
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#19 |
Born Psycho
![]() Join Date: Feb 2001
Location: brentwood,cal,usa
Posts: 4,889
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Re: Anyone tried a disabler for active fuel management?
we have another one in the shop right now- 15 tahoe 5.3- disabled #7 the hard way but it made it all the way to 136K before it failed
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jerry moss 72 cheyenne super K20- tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,tow hooks,bumper guards,toolbox,aux. fuel tank,posi front and rear,plus other goodies!!! SOLD 69 suburban K20-tilt,tach,vacuum,speedwarning,buckets,shoulder belts,am/fm,4 inch all spring lift,4 speed, 14 bolt full floater, dana 44 HD,warn winch,posi front and rear,tow hooks,plus other goodies. 73/80 chevy/gmc K20 SB400,turbo 400,205,tilt,a-c,gas hog. 77 K/5 cheyenne blazer-daily driver/beater. SON HAS IT NOW BRENTWOOD,CALIFORNIA |
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#20 |
Carpe manana
![]() ![]() Join Date: Dec 2010
Location: Eau Claire, WI
Posts: 12,406
|
Re: Anyone tried a disabler for active fuel management?
Earlier in the year I picked up one of the Range brand disablers and ran it while on a two week road trip and will continue to do so when I start daily driving it again come winter.
__________________
1972 K5 CST Highlander Blazer: http://67-72chevytrucks.com/vboard/s...d.php?t=708547 1972 K20 Cheyenne Super: http://67-72chevytrucks.com/vboard/s...d.php?t=528308 ![]() |
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#21 |
Registered User
Join Date: May 2009
Location: Motor City
Posts: 9,206
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Re: Anyone tried a disabler for active fuel management?
(subscribed)
K
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Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/ |
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#22 |
Senior Member
![]() Join Date: Jul 2015
Location: Warrenton VA
Posts: 1,054
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Re: Anyone tried a disabler for active fuel management?
I had my 16 yukon tuned by blackbear performance. They disabled the AFM, changed up the trans programming, and added a little pep to her, don't think I lost any MPG. Mine just hit 60k over the weekend, also have a catch can. The lifters typically fail while in AFM mode and then don't pump back up. A quality PM routine with quality air filters, not a K&N, will go a long way in the longevity of the system bypassed or not. I had an 08 Sierra that had 205k on it and had no issues with the AFM before I did a cam, headers, and tune on that one to avoid future problems because I was planning on keeping it for a while.
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71 c-10 Long Bed, under the knife for a No Limit Engineering Wide Ride Chassis Pack and coil over static drop. 07 Silverado Classic 2wd 95 Camaro 427SBC/TH350 |
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#23 |
Moderator
![]() Join Date: May 2007
Location: Southern Cal
Posts: 20,008
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Re: Anyone tried a disabler for active fuel management?
Honda has a similar thing called VCM (variable cylinder management) they use on their V6 engines. It serves no purpose other than to cause engine problems. First thing I did was get a tuner and have it deactivated on my Odyssey.
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1972 C/10 Cheyenne Super SWB. Restored, loaded, slammed. 1968 C/10 50th Anniversary LWB. Unrestored, stock, daily driver/work truck. RIP ElJay RIP 67ChevyRedneck RIP Grumpy Old Man |
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