Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. That might show up if you cut the filter and looked for debris in the pleats. A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. It is also known as Displacement on Demand (DoD) or cylinder deactivation. I ran 0W-20 on more the 5000 miles between changes. If you dont have VVT, you could use part number NAL-12561721 (LQ9) along with a 4-pole 3-bolt 2005 Corvette cam sprocket p/n NAL-12586481 to make it compatible with your ECM. Thanks. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. An electromechanical system deactivates and reactivates all 16 of the engine's hydraulic valve lifters, controlling valve actuation. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. I guess I might have to call a dealership or GM to get a definite answer on this one. Some drivers want V8 power under their foot at all times. AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. Get this, rebuild is only rings and maybe lifters. The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. Just one or two. This system is the most effective way to disable AFM. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. The lifter seems to recharge whenever the truck sits for some time. I also notice that it doesnt go into V4 when it is cold. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. No clue what to do. I couldnt agree with you less, yet I respect your opinions. . Covers me to 100K. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? any help? Is this the shield you referred to in a past post? I cant really tell from driving. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor. The dealer in Rockhill, SC when asked only said they had not had a problem. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? If the lifter actually fails so that the mechanism wont release, it wont work. 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 []. There are no changes in the valves or the springs. It has AMF. If you installed a performance cam intended for a car, it may be bleeding off some low end compression. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? Hi Mike, the metal shield you noticed is probably the windage tray. AFMengines use special lifters for cylinders 1, 4, 6, and 7. All ready done valve job . Dont drive it if you have a dead cylinder due to afm failure. Install the disabler when you get your Yukon back and it will remain in good working order. This allows the engine to run in V8 mode. the extra oil isnt needed. 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. When cylinders are deactivated, the number of crankshaft rotation increases between firing pulses. I have a 2011 Chevy Tahoe with the 5.3 Gen 4 LS (VIN Code 0) and I bought a CAM motion DOD/AFM delete kit, 3 bolt drop in CAM Motion stage 2 camshaft, VVT delete kit and finally a Diablo Predator 2 Premium for GM programmer. But not sure very annoying. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo Have a lifter problem on my 2010 5.3 Silverado. . [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Only running on drivers side cylinders. Just recently, GM announced a temporary closure. GM offers the following diagnostic steps in determining if this is the problem. 2011 Chevy Avalanche LTZ. Corvette that does employ AFM. I read something the other day which I found to be funny. Was thinking maybe I could trick the ruck into thinking the engine was not warmed up, however, this might cause some problems for other processes, such as mix ratio and timing. Would never take it on a long trip. I have a 2008 Buick Lacrosse super that I am having a hard time finding a tuner or a tune shop that can turn off the afm. At this state, a disabler would probably do what you need it to do. No movement on the rocker arms. The LFA was upgraded with AFM and [], [] improvement over AFM, DFM has 17 different cylinder firing patterns and switches seamlessly between them to provide just []. Then had to drive the truck back to Tampa from Cheifland Fl. Thankfull for any ideeas! Because its not just GM that have engine problems. I sold them when they were new. Ayush Srivastava Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Your email address will not be published. After taking a $3.6h bath on the lifter/valve work and doing a little research, how can GM allow a problem like this AFM continue from 07 to present? If you think GM pioneered cylinder deactivation, guess again Billy, there is some interesting trivia here on the L92. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. Very confusing stuff out there. (Bought car 1 day before lifter died!) Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? I would just have the AFM disabled (tuned out) then. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Never did strand me on the side of the road way. Thank you for your time. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. I ordered a electronic disabler for it today. This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. 8000 grand for the repair mine was 1,700.00 to repair, I had a 2004 small block v8(4.8) 331,000 miles on the truck,it was the usual on the maintenance front axles,etc. It is usually first noticed during highway driving. I dont know where to being to look for the problem. While it does still use the GM Active Fuel Management cylinder deactivation technology that caused a plethora of issues on the gen-four Vortec 5300 engines, it seems that GM has solved the issues related to excessive oil consumption. please respond with your opinion. Had similar problems under warranty, no telling what they rigged me up with at the dealer. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Wed recommend a call to our partners at Summit Racing. While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. Since it is not costing me anything out of pocket, I did not go with the Delete Kit (did not want to spend the money). Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. Now the problems back, I have 180k miles on it now. NOT GOOD!! Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. Getting ready to diy for $450. Should I buy one to disable the V4 mode? 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue Having it fixed now, just curious Seems like a problematic design. It actavated the lifter? How to Delete or Disable Active Fuel Management (AFM) on GM Engines I have always loved Ford and Chevys , I dont like this Vehicle not one bit, starring shaft has to be lubed or it whines, front A arms has done been replaced, tapping in motor, leaf springs has been lubed, retorqued, put completely new leaf springs back in on the rear , grease all down from rims to body of truck, you have to clean often,console shakes as if milk shakes in console which later they also put rubber bushings in front of coils of shocks ( front end) .You lock it down in 44 it s metal to metal , As of now Im at 32,000 done gone threw all the arbitrator laws depending on how it goes? GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 Hi Brian, Who knew? I would appreciate it if you let me know how you make out. Given maximum engine power is not required during the majority of everyday driving, AFM works to deactivate engine cylinders when they are not needed, such as when cruising on the highway, thus. 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 []. Brian, we have a 2007 Yukon Denali in our shop with a 6.2L v-8 that has suffered a lifter failure with camshaft damage. i just bought a 2018 Silverado with the 5.3 Hopefully more is known by then. My Wifes 17 Buick with afm was my attempt to get back to gm. The exhaust valve remains open during the intake stroke and closes just before BDC.
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