gm cylinder deactivation problems

Any thoughts or suggestions would be appreciated. I had a 2007 Yukon XL 5.3 with the AFM. No it runs fine on sylinder one but not on 6 or 7!!! What type of disabler did you go with? If you installed a performance cam intended for a car, it may be bleeding off some low end compression. My 5.3 is. They layed over night in engine oil before instalation. $8500.00 fix. Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. But after reading this thread, Im a little concerned about the long-term reliability. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. I just bought a 2015 5 3 17000 miles I was thinking about eliminating the 4-cylinder if I delete it with just the programmer will it hurt my motor? module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. Engine oil pressure is fine. Since no air can get in or out, four cylinders provide no power. Nine plaintiffs filed the General . . Any truth to that? 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. Did Obama make them do this? Who knew? After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. 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??? Brian, thank you for the quick response. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. 1. The Jury is still out on the Gen. 5s but the warranty could be an issue. Just recently, GM announced a temporary closure. it is the regulator guy! I have a 2013 1500 with the LC9. The Tundra fares better but the frame has the rigidity of wet spaghetti and the 5.7 has had problems with VVT solenoids and the plastic timing chain tensioners. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . I noticed this discussion mainly addresses Chevy Silverados and other trucks? My local mechanic suggested whatever I buy with an AFM he will send off the ECU to have the AFM flashed out. Double digit MPGs in my 98 K1500 would be a dream lmao. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. I also have 08 Burb, but have different symptoms (high oil consumption, blue exhaust smoke at start, and now a really rough start after sitting overnight). Why cant u just unplug the solenoid on back of engine by oil pressure sensor? I have an 07 Yukon with over 180K. Dont drive it if you have a dead cylinder due to afm failure. You will get codes thrown if the afm is physically removed without telling the ECM you did so. 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. When you drain the oil at three to four thousand miles its still clean. [] engines is that when VVT (variable valve timing) appeared and was later followed by AFM (which is Active Fuel Management, when the engine deletes four cylinders under light load) both of these packages drastically affect []. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. No clue what to do. 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. How long did it take? They took the engine down today found so much damage inside they ordered a new engine from Detroit. I dont know where to being to look for the problem. If the 4th cylinder lifter has failed, would driving it damage the engine? What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? I have 4 GMCs in my driveway right now only one with AFM its always popping DTCs, 06 Yukon (not AFM)never had a light in 12 years! Its ribbed with solenoids on the underside. There are so many more oil passages on engines these days. CHANGE YOUR OIL!!!!! Told her that it would not last and that she needed to find a different way to get around. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Only wish Id did my homework, nothing but issues, from 14,000 miles it starts this motor noise,as if lifters at cold starts, let set up for 8 hrs same noise, this noise is on the right side of engine, it lasts 5 seconds but never heard this until we had this cold spell in the state low temperatures or it was just time for this to start? My dad ended up running seafoam through it and some transmission fluid, changed the oil pressure sensor which I definitely think was bad and also cleaned out the little screen and he said it was so full of junk and metal scraps. Would you get enough power to drive at freeway speeds? Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! Pulled right valve cover an rockers on syl 6 dont move. The trucks are only supposed to use two four. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). Cylinder deactivation works to save fuel, but it may not be for the reasons you think. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. The GM 2.7-liter L3B Turbo four-cylinder engine for Chevy Silverado and GMC Sierra pickups is meant to change minds about power and torque in a small package. If so what would the vin code be? Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. 2011 Chevy Avalanche LTZ. So for all of you that continue to complain about how bad these things are. This is what I keep telling people. 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. Correct me if Im wrong- If such an item was available couldnt you then just replace the lifters in the 4 AFM cylinders and then just run a disabler or have your ECM/PCM reprogrammed to have AFM disabled permanently. I plan on getting a tuner to disable the AFM. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. It only has about 9k miles on it. I have a 2011 GMC Sierra 1500 with the 5.3. Disable Active Fuel Management - Ricks Free Auto Repair Advice We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? I speak from some experience. . This new lawsuit is essentially identical to the previous. I have a 12 with 4.8 Silverado 75000 miles How to Delete or Disable Active Fuel Management (AFM) on GM Engines I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. On June 4th you stated The vehicles affected were 2007 to Feb. 2011 AFM equipped engines (Aluminum or Iron block-L94, LZ1, L99, LC9, LH6, L76, LFA, LMG, and LY5) I am looking at purchasing a 2012 Tahoe with the LMG per the build sheet. I know a few guys with Tundras. AFM - active fuel management strategy which deactivates the lifters on specific . A custom tune by a knowledgeable tuner with access to a chassis dyno will pay a lot of other dividends other on top of turning off afm and VVT. I asked my local Chevy dealer, from whom I purchased the engine, to find out why the oil pan lacked the fitting. Having it fixed now, just curious Seems like a problematic design. 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? My 2012 Silverado 5.3L just did the same thing as your Tahoe Brian. Should I wait until the warranty runs out, or will that be too late to stop possible damage? The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. Apparently all passkey III keys are not the same,, I bought one that said for 2006 impala assuming all pk3 would be the same, and I could not get it programmed in my saab 9-7,, so how Im waiting on ones that specially said for saab 9-7. hoping they will work. But not sure very annoying. Sometimes it will do it all the time and other times can drive it for 10 miles and then it starts but doesnt do it constantly when driving. Thanks for the advice Brian! All Gen IV engine blocks haveAFMtowers and oil passages cast in. 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. A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . has 92,000 miles and was just told I have cam and lifter failure. Most of the complaints show up in the 2009 to 2011 model years. (Bought car 1 day before lifter died!) WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. I guess I might have to call a dealership or GM to get a definite answer on this one. So I researched and got an AFM disabler. This happened on a camping trip with my kids last friday night. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo Help appreciated. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Active Fuel Management - Wikipedia Everything was fine for two weeks, ow customer complains s it same noise it made as before. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. Teflon coatings does not last. They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. I have 217,000+ on it and it never fails meever! The problem:. Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? You are correct. Solenoids, new lifters also test voltage to solenoid pack all good their, Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? It prevents the computer from switching over to four-cylinder mode. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). I wont bother with blocking the relief valve. Hello. Ive only put a straight pipe exhaust, intake, and a boost controller on it. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. I have a 2011 GMC with over 162,000 miles on it and it runs great! Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders.