Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. Given that, would you recommend buying one of the OBD-II devices to disable AFM? When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Having it fixed now, just curious Seems like a problematic design. The Cylinder Deactivation system, known as the Active Fuel Management system by GM, shuts off some of the cylinders when extra power is not needed which improves fuel economy. My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. Its a CA EMMISIONS TRUCK. Replace the cam or do the delete kit? NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. please respond with your opinion. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. in your opinion will this work, i really dont see any reason it wouldnt. He used seafoam and changed to synthetic oil. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. It is being covered under warranty since I only have 72,000 miles on it. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. The car runs great apart from the shuddering at those speeds. I have the towing package on my 13 Tahoe LTZ. Brian, I have been reading your article about the AFM. If the 4th cylinder lifter has failed, would driving it damage the engine? An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. The valve itself is part number W0133-2574213. Cylinders two, three, and eight are all similar in cylinder deactivation. I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. Is this due to the AFM being shut off? Very confusing stuff out there. Dummy Me thought gm learned its lesson in 1981 but they never did and I Too am stuck with a Buick thats just waiting to self destruct. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). Do you think I can still disable AFM? Replacing engine due to issues caused by AFM. Another option is to plug it entirely if the AFM is already removed. I have an 07 Silverado 1500 ltz. Install ls3 valley cover. Would it be fine to go ahead with the AFM Disabler? Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. When a deactivated cylinder is reactivated, the control system opens the exhaust valve first to evacuate the trapped exhaust gas, before reactivating the intake valve to allow reactivated cylinders to revert to the normal operation of the compression/combustion exhaust/intake cycle. Dale, I have a 08 Tahoe thats doing the same thing.Any info you have on this would be appreciated, [] Do they have a downside? Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. It could be the filter screen under the oil sending unit. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. This should be added to your earlier model if you experience oil consumption. With 40000 so the trans fluid worked for you then? 1. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. Its got a hundred forty-five thousand miles on it. Does the disabler prevent the engine damage in the first place? When I first bought my newer truck with fuel management, the GM tech at the dealership told me; if I wanted the engine to live a long life keep the RPMs below 4500. What type of ODBII gadget did you use? Change your oil. All New lifters were from AC delco. I quites down to nothing after running for about a minute. With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. Open to suggestions about best course of action. Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode. Everything else looked good. Will the plug in deactivater fix the oil consumption or will it cause more consumption? http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. But it also restricts passages that the oil runs through. Im always sorry to hear when people run into issues like these. My daughters car had about 230,000 miles when she complained of the problem. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. There are 5.3 cylinder deactivation problems that can occur. I will keep reading and take notes. The LZ1 was upgraded with AFM and []. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. Diablo says yes but they do not provide tunes. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Ive been reading, with disgust and concern of the lifter/cam situation. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. Most of the complaints show up in the 2009 to 2011 model years. Its Chrysler and Ford. I havent has any lifter or cam issues. I want to put a AFM disabler in it what all do I need to have done. Im praying that my RangeTech buys me a few years. . I did noticed the oil consumption but it was rare that I would have to add oil. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. That inherently less smooth operation requires additional NVH dampening. My concern is if I leave the non-AFM lifter cover in place & have nothing to plug the 5 pin AFM solenoid connector into, will I get a MIL? As it turned out one of the cam bearings was failing and causing the cam to wobble (my guess) which messed up the AFM and probably some other stuff too. You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? I have a 2011 GMC Sierra 1500 with the 5.3. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. Had similar problems under warranty, no telling what they rigged me up with at the dealer. I recently bought a 2018 Silverado 5.3L with AFM. I have already dropped a lot of money on this truck (08 suburban). They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. Most will want to get rid of the AFM immediately. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Ditto , never buy a throw away vehicle again is my recommendation and my fix . how many miles do you have on your engine? . What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Any advice that you could offer would be great. There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit.
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