Absolutely agree, but we all know GM cant afford to recall them all & definitely wont, gettin a Toyota, but first will go to GM dealer and ask to see a truck without AFM & when they say they dont have it Ill say See ya, I have an appointment with the Toyota dealer! Always had GMs never anything else till now. The computers had not evolved enough to control the sytem. Delete the AFM, buy a tuner/chip, take it to a performance place and get an actual tune done that fixes it, replace the AFM lifters with non AFM type, change other engine components with thisetc..etc..etc??? Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . Here's what you need to know: 1. It is also known as Displacement on Demand (DoD) or cylinder deactivation. Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. When you don't need the full power of the engine, it provides better fuel economy." I have the towing package on my 13 Tahoe LTZ. I noticed this discussion mainly addresses Chevy Silverados and other trucks? Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Ive only put a straight pipe exhaust, intake, and a boost controller on it. The car runs great apart from the shuddering at those speeds. It is a bad deal for sure.ive fixed a few best thing u can do is delete it in buy kit.no sense in fixing a flawed problem with the same flawed parts. We figured we already had the intake manifold off to install the engine, why run the risk of MIL only to have to removed the intake manifold again without being paid. We believe this confirmed that the AFM has never been operating in this vehicle. What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. I am hoping this does the trick. No problems with any to this point. I have a 2013 1500 with the LC9. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. I have already dropped a lot of money on this truck (08 suburban). misfire or anything. If you left the original cam in, the AFM cylinders will be down about 25 lbs. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. All Cylinders. I have been assuming this is just a slow to pump-up lifter or lifters. Can they be faulty? After all we bailed them out of bankruptcy. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. If I put my truck in manual 5, it doesnt try to go into V4 mode. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. I recently bought a low mileage 2013 Silverado and the lifters collapsed. [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. It has has 9000 miles and no lifter or other issues or codes so far. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. GM's Active Fuel Management (AFM) works under certain light load driving conditions to maximize fuel economy by deactivating 4 of the engines 8 cylinders. HELP, I have 2005 envoy that runs makes lifter noise then dies in about 30 seconds then I started it one day and it ran with little noise for 5 min started next day and it starts and dies again got heads off was told I could put ls 3 lifters in is that true or is there something else I could do thanks Duane. . If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Remembered that after I bought my Tahoe. Thanks. lol. Because its not just GM that have engine problems. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? No clue what to do. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. She started to have the lifter problem again after 60,000 miles more. I still get a P0336 code every once in a while but still good to drive around town. 2 15 with 5.3 Sierras both with 100k and []. There are 5.3 cylinder deactivation problems that can occur. The only problem is the extra spray on the cylinder models if a deflector isnt used and this can show up as increased oil consumption. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. Thats not all bad because it saves the cost of an AFM delete kit. Definitely dont want to do anything to fix one problem and create another. It came back on last Wednesday starting with a flash. Disable the afm. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. When you drain the oil at three to four thousand miles its still clean. GM Lifter Recall Needed, Says Class Action Lawsuit On the caddis it helped to relocate the computer inboard the passenger compartment to keep them cool helped . Thank you. GM uses 3 different styles all are engine specific. Replacing engine due to issues caused by AFM. What type of disabler did you go with? When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. I got the AMF disabler anyway and so far so good. The Jury is still out on the Gen. 5s but the warranty could be an issue. . I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. Pod. From what Ive read new and low mileage engines with no issues is ideal to do a afm delete, tune, or use of a disabler. That inherently less smooth operation requires additional NVH dampening. In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. I have seen more internal engine failures in the last 5 years or so than I have in the first 15 years in the business. It was good for about 10 miles and started with same loud knock noise. I have only put about 600 miles on it and noticed that the oil was a bit low and am hoping that it was that way when I picked it up. The engine was not Flex Fuel (E85) capable and did not use Variable Valve Timing (VVT) [], [] TheL76like its LS2 siblingis a 6.0L, Gen. 4, aluminum small block engine that was used both in GM cars and trucks. Any thoughts or suggestions would be appreciated. I would say maybe 5% of my customers keep up on their oil changes. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Their tech guys have seen it all and may have some thoughts on this as well. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. With that said, the current global chip shortage has been affecting the industry on a wide scale, forcing production halt among several automakers. December 20, 2021 A GM lifter recall should allegedly be ordered for Buick, Cadillac, Chevrolet and GMC vehicles equipped with 5.3L, 6.0L or 6.2L V8 engines. There may be an ignition related issue on that cylinder. I have a 2014 Silverado with a 5-3. I have a 2007 Gmc Envoy Denali with LH6 cant find a good LH6 engine but I found a 2011 LC9 engine w 52000 miles will everything plug up or what am I getting into? I am worrking on a 2007 chev Silverado 6.0 engine, [] the L76 that was equipped with AFM and had a ribbed valley cover, the L98 cover was []. The collapsed lifters will not engage the pushrods and both valves remain closed. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. I had a 2007 Yukon XL 5.3 with the AFM. I would just have the AFM disabled (tuned out) then. in your opinion will this work, i really dont see any reason it wouldnt. Hi Mike, the metal shield you noticed is probably the windage tray. It actavated the lifter? Told her that it would not last and that she needed to find a different way to get around. GM switched over to the 4100 v-8 in 1982. Learn how your comment data is processed. This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Nine plaintiffs filed the General . Dont want to make a move on a new truck or jump to a 2500 yet. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. Have there been improvements in more recent model years employing AFM [2014 or newer]? PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Friend will send to me from Arizona. They took the engine down today found so much damage inside they ordered a new engine from Detroit. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? As a side note, Range Technologies recommends removing the disabler between visits to the dealer as they will need to access the OBD-2 port. The oil collapses the plunger inside the lifter. Please report back if you have any issues, but I think you are in good shape. Should I wait until the warranty runs out, or will that be too late to stop possible damage? Service manager said nothing else needs to be replaced because the engine has a Teflon coating. I just got new warranty engine and dont want this issue again? Been driving with no issues but I did notice that the AFM disabler removed a P0449 code (Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction) dont know if this is a coincidence or they are related??? Would never take it on a long trip. Here are a few of the issues that you'll want to keep on your radar if you drive a 2017 Chevy or GMC vehicle with a 5.3L engine in it. I went with the new motor for the warranty. It is being covered under warranty since I only have 72,000 miles on it. The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] The original version sprayed oil on the cylinder walls and increased oil consumption. All the time. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? He unstuck it and I took it for a drive and same thing happened. Love the truck so far. As we were installing the sensors prior to installation in the vehicle, we noticed that there was no fitting on the oil pan for the oil level sensor. Have misfire code and engine has what I would call a surge while driving. I have read synthetic isnt good for AFM lifters. This system is the most effective way to disable AFM. I ordered a electronic disabler for it today. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . My 2002 I had over 298K on it with no engine related issues. GM claims fuel improvements ranging from 5%-15% depending on the engine. Carbon Build-Up in the Intake Ports. How to Delete or Disable Active Fuel Management (AFM) The LZ1 was upgraded with AFM and []. 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. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. CHANGE YOUR OIL!!!!! Is Your 5.3L V8 Engine Eating Up Too Much Oil? We - GM Parts Online A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. The motor I pulled was a 2007 LY5 with about 77k on it. This happened on a camping trip with my kids last friday night. Also, it is the easiest way [], [] for the 2010 Chevy Camaro SSis also a Gen IV 6.2L aluminum-block V8, but with the addition of Active Fuel Management and Variable Valve Timing. This should be added to your earlier model if you experience oil consumption. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. Will the plug in deactivater fix the oil consumption or will it cause more consumption? Ayush Srivastava A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Thanks for the detailed post! My 5.3 has a vin code of O. has 92,000 miles and was just told I have cam and lifter failure. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. Then it takes out the lifter again and again until you bite the bullet and replace the cam. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. Why this happens is a more . If you just crack it without it starting it moves all the time . I have an 07 Yukon with over 180K. Now you tell me AFM works and I will tell you; that you are full of shit! Gary, [] 3 engines didnt have AFM (Active Fuel Management) or VVT (Variable Valve Timing), so you dont have the expense of an AFM or VVT delete []. Hi. Its not GMs choice to use AFM. Just one or two. Billy, there is some interesting trivia here on the L92. I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. Do not pay that amount. Installed them again, all facing upwards, will know tomorrow if that was the solution.If this is the cause i cant beleve why they arnt build so that it is impossible to install them the wrong way in the plastic holder.And altso that there was no warning or installation advice With the New lifters.If these are the only lifters in the Whole world that must be in i have a 2007 suburban 6.0 and the number 4 intake lifter took a dive.i have already started to disassemble the engine as i plan on replacing all the lifters and reassemble the engine as i never had any other problems with it. Hopefully more is known by then. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). Still have no power. .or something similar . Ive got about 6 to 8 psi of oil pressure after the engine gets warm and I have to stop at a traffic light. Thank you again for the response. Don't even get me started on the shortened life of the cooling, starting and charging systems. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. It does seem that when they start goingthey go quickly. 4,7 plugs foul runs rough at idle. There are no changes in the valves or the springs. But after reading this thread, Im a little concerned about the long-term reliability. Ditto , never buy a throw away vehicle again is my recommendation and my fix . Ketil, let us know what you find out. It has AMF. Everything was fine for two weeks, ow customer complains s it same noise it made as before. Junk . also in the pan is another AFM oil filter near the external engine oil filter. The valve itself is part number W0133-2574213. Number 7 cylinder lifters stops moving when truck starts. I had one fail and it chattered the cam to the point that I had to Install a new cam. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. 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.

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