gm cylinder deactivation problems

chevrolet - How does cylinder deactivation work? - Motor Vehicle You can unplug the sensor on the vacuum booster and it will fool the computer into thinking there is a high demand on the engine and shut down the AFM system but you will have a Check engine light in your face for doing so . Does the disabler prevent the engine damage in the first place? 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. I will keep reading and take notes. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. so the trans fluid worked for you then? It only has about 9k miles on it. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? I would just have the AFM disabled (tuned out) then. AFMengines use special lifters for cylinders 1, 4, 6, and 7. 50,000 miles. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. I am a long time GM fan but after reading how they messed up the 5.3 ( I had a fantastic 2003 Z72 off road) Ill look else ware for my next vehicle. .IMHO . Problems After AFM Delete And How to Solve Them? - Tools Bible The engine had 200K miles. So now at 168 thousand miles it still runs good but gets bad gass mileage. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. i just bought a 2018 Silverado with the 5.3 Any advice that you could offer would be great. It uses a M14 x 1.5 thread plug like Dorman 65217. The engine will operate on 8cylinders, or V8mode, during engine starting, engine idling, and medium to heavy throttle applications. I have a shop 39 yrs . (Bought car 1 day before lifter died!) Cylinder Deactivation (Active Fuel Management) General Motors Active Fuel Management engine control system has the ability, under certain light load driving conditions, to provide maximum fuel economy by deactivating 4 of the engines 8 cylinders. So I researched and got an AFM disabler. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? Fouls those plugs. PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. Should I wait until the warranty runs out, or will that be too late to stop possible damage? I can tell you for the past 2 years I changed out my LC9 5.3L fully synthetic oil every 3,000, even though Mobile Oil claims 10,000 miles or more. GM Escalates Cylinder Deactivation With Dynamic Fuel - EngineLabs This is in response to pretty much everyone. The cost of just rings $4,000.00, [] Disable your Chevy AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] like front timing cover, knock sensor location, cylinder head style (cathedral ports), AFM (Active Fuel Management), and other components are key clues to which engine family youre looking []. 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? Thanks for your help. Do not pay that amount. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. I recently bought a 2018 Silverado 5.3L with AFM. 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. Excess oil will be pushed out of the pressure relief valve into the oil pan. Teflon coatings does not last. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . What if I was able to trick the computer into thinking it is in 5th gear when it is actually in 6th? I call it active obama fuel management .A scam . The most common issue GM vehicle owners with AFM report is increased fuel consumption. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. I have read synthetic isnt good for AFM lifters. Why does GM's cylinder deactivation cause lifter failure? The system uses solenoids to deliver oil pressure to control. []. The write up confuses me. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? bought at Brian Tooley Racing ! Take a look at what bmw did in its R1250 bike. 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). CAM motion says no just have to disable the AFM and VVT with a stock tune as the camshaft is not an aggressive camshaft but a drop in. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . Very expensive repair too! []. Engine oil pressure is fine. I have a 2011 GMC Sierra 1500 with the 5.3. The engine also had 799 or 243 casting heads which are closely related to the LS6. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. When you drain the oil at three to four thousand miles its still clean. He stated if I continued to exceed 4500 RPM it would blow the lifters out. This video covers the steps youll need to take before upgrading to a larger [], I am installing a complete delete system, just wondering what it will do if dont plug the oil pressure relief valve? 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. What type of disabler did you go with? 2011 Chevy Avalanche LTZ. 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. The problem:. Hi Brian, But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. If you are using VVT, you could use the NAL-12612273 (L92) cam. They layed over night in engine oil before instalation. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. Does the Pressure relief vavle ever go bad?? No it runs fine on sylinder one but not on 6 or 7!!! I have also heard that the oil pump is to be changed and I have also heard that it does not matter. I can literally drive from Seattle to Redding CA on one tank. . But the problem at that time was the computer technology. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes Thanks for the advice Brian! 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??? My question is: do I install the electronic disabler on the new engine to avoid future issues? Number 7 cylinder lifters stops moving when truck starts. I am trying to find out of this is true. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. Disable the afm. The motor I pulled was a 2007 LY5 with about 77k on it. Truck ran fine before that. GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC Found that all passenger side cylinders are not firing. 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. When they are locked into position, they wont wear further and cause issues down the road. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. Oil 0w or 5w -20 I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? If I put the Range module on, is that all I need to do, both now and long term? [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. 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 []. I speak from some experience. Didnt change exhaust nor tune so likely no change in power/torque. 1. Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. Welcome to socialism folks . We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? If I had been able to push the issue and get the time, I would have done the full fix at first without the hassle. . NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. I wouldnt trade my 2000 Silverado, 5.3 liter that has constantly gotten 20 mpg since I bought it 15 years ago, for a dozen of these new $50,000 POS. This allows the engine to run in V8 mode. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. 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. any help? It seems this tough engine has everything incorporated into it. I would rather stay a V8 full time than deal with AFM issues in the future. . Thanks. Replaced all lifters. They should let us the better mileage. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. The oil-pressure controlled system that operates the special lifters is VERY prone to failure, if the oil is not changed on time, OR if the wrong oil is used. 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. It is currently at the dealer having a new long block installed under warranty. No other V-8 truck of similar weight can do that (except another GM with AFM). Not sure which direction to go from here. Still have no power. They dont so any better than domestics on mpgs. It has the orings in place, that seals the towers. GM Releases Valve Lifter Service Update For V8 Engines General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. . I am wondering the same thing. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. Once the lifter has been damaged, the cam is probably also damaged. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 Yesterday my motor (116,000 miles) felt like it went into limp mode when decelerating from 8 cyl to 4 cyl but it recovered.This is the second time that this has happened in 6 months so I think that I am on the slope. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. Driver reported this occurred suddenly while driving down the highway. Chevrolet Silverado 2014-Present: Common Problems Im confused from the write up about the plug in. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. It prevents the computer from switching over to four-cylinder mode. The oil collapses the plunger inside the lifter. in your opinion will this work, i really dont see any reason it wouldnt. [], [] as the LS engine familys hybrid engine in trucks and SUVs. I am confused about the plug in disabler. Cant believe they havent fixed this in a decade. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. "The idea behind cylinder deactivation is that when you're cruising down the freeway and there's low load, the engine can turn off half the cylinders and in theory burn half as much gas. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. What makes you think it was a design flaw ? 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? I quites down to nothing after running for about a minute. It replaces the AFM components with standard parts. Love the truck. The original version sprayed oil on the cylinder walls and increased oil consumption. Is the Pressure relief valve replaceable? The biggest problem is nobody changes their oil on time. He used seafoam and changed to synthetic oil. i currently get 8 mpg with the vortec 350 and a 4l60, I have a 99 Sub k1500 that i get 16 to 18 hwy loaded lightly, I get about 14 on my 95 Tahoe 2 door with 5.7 and 4l60. Definitely dont want to do anything to fix one problem and create another. Any truth to that? New plugs and wires. It does seem that when they start goingthey go quickly. How stupid do you have to be to whine like a welfare check cashing idiot when there are literally 3 or 4 different ways to totally disable AFM. Hi. I have a Yukon 116k it now needs its 3rd set of lifters and cam. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Most of all, my concern is reliability. What was happening to the first is slowly (or quickly in your case) happening to the others. Ketil, let us know what you find out. a little burning oil is a minor thing, my main concern is avoiding a multi-thousand dollar repair needed to the motor.