gm cylinder deactivation problems

After all we bailed them out of bankruptcy. I drive the same 320 mile trip every two weeks and drive the same route and full tank. I tried the trans fluid in the oil. All eight cylinders are now powering the engine. I recently bought a low mileage 2013 Silverado and the lifters collapsed. They lasted one year with big problems. I had to replace them all and the camshaft as well. If I put my truck in manual 5, it doesnt try to go into V4 mode. Lost number four Ever since that which was Feb/March 2020 i get a intermittent rattle does not do it all the time and I am not getting any codes i.e. Replacing engine due to issues caused by AFM. Truck has an active P0300 code and runs very rough. I would appreciate it if you let me know how you make out. The computers had not evolved enough to control the sytem. I call it active obama fuel management .A scam . Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. 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. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. 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. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. another common cause for low OP is the oil pick up tube O ring. Toyota will be my next truck unless GM owns up and makes wright with consumers. I have a 2011 GMC with over 162,000 miles on it and it runs great! That might show up if you cut the filter and looked for debris in the pleats. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. any help? Thanks for the advice Brian! I only had 81k on the motor. Ive heard the Brand name Range thrown around in other forums, This is how mine started outthen 6 months later on the highway the service stabilitrak light and flashing engine light came on. The engine also had 799 or 243 casting heads which are closely related to the LS6. Thankfull for any ideeas! Just shut AFM off. Unfortunately, I found out about the lifters too late. But the problem at that time was the computer technology. With 40000 But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . If you are using VVT, you could use the NAL-12612273 (L92) cam. 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 If the lifter actually fails so that the mechanism wont release, it wont work. There may be an ignition related issue on that cylinder. According to some experts, switching to cylinder deactivation reduces the emissions high somewhere between 4 and 10%, which is a huge percentage of saving the air from pollution. 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. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. You could also have tried that if the trans oil didnt work. Ive been reading, with disgust and concern of the lifter/cam situation. 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. Question i just bought a 2005 Saab 9-7 with 5.3 v8, (same as GMC envoy) which came with AFM, the car runs fine, so if i just install the OBDII electronic device, is it just as likely that my lifters will still go bad? In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. 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. This system is the most effective way to disable AFM. How did your turn out? What would you do if you were in my situation? Service manager said nothing else needs to be replaced because the engine has a Teflon coating. On the AFM lifters that dosnt work i have installed them With the oil hole Down! What makes you think it was a design flaw ? Never did strand me on the side of the road way. The lifter seems to recharge whenever the truck sits for some time. 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. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? 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. I have a 07 Yukon with 180K and no issues what so ever. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. 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 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. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. 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. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Corvette that does employ AFM. He used seafoam and changed to synthetic oil. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley GM should recall every vehicle with this terrible design flaw! The motor I pulled was a 2007 LY5 with about 77k on it. Mine did at the exact same time. 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. The write up confuses me. The older truck gets 19 mpg the newer truck with fuel management gets 14. Just one or two. Verified over hundreds of trips, makes no sense. Active Fuel Management - Wikipedia Replaced all lifters. I didnt have lifters fail, I had the 4 cylinders 1,4,6,7 have such blow by that my choice was a valve and piston job or a new motor. Brian, I have the same question as Scott. Can they be faulty? Engines with AFM use a high-volume oil pump. Double digit MPGs in my 98 K1500 would be a dream lmao. AFM - active fuel management strategy which deactivates the lifters on specific . Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. 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? I am wondering the same thing. It seems to me that the high volume oil pump should not hopefully cause premature wear but if it is pushing more oil through the heads than I guess the valve stem seals have more work to do. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. Then had to drive the truck back to Tampa from Cheifland Fl. I had a 2007 Yukon XL 5.3 with the AFM. Most of all, my concern is reliability. I have read synthetic isnt good for AFM lifters. You are correct. Would doing the disabler option once I get it back be the right one? 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). A problem with the software caused the engine to idle with most of their cylinders, thus overheating the exhaust . , Production date on the vehicle is 04/2006 oddly enough. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. Yes a poor design but a flaw ? Thats a tough call, if the warranty will cover itId let it run out. 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! Since no air can get in or out, four cylinders provide no power. 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. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . TheAFMcylinders are opposite of one another in the firing order. 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! I have a 2013 1500 with the LC9. 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. im going to plug in a dissabler when im done to keep it V8 mode all the time. [], [] rugged iron block 6.0L came with VVT, but without Active Fuel Management, which saves you the cost of an AFM delete [], [] The LH6 engine is a 5.3L Gen. IV aluminum engine that replaced the LM4 in 2005. The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. When an engine is contstantly running on oil that is broken down, it not only wheres out components because of no protection. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. 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). GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority Cylinder deactivation | GM Truck Club Forum One must anticipate this. I have the towing package on my 13 Tahoe LTZ. Thanks. The oil pump is high volume, but there are a lot of people that dont change it and rely on the pressure valve to keep the volume manageable. Wed recommend a call to our partners at Summit Racing. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. This is my second Avalanche and I never had any issues with either of them. Did Obama make them do this? Told her that it would not last and that she needed to find a different way to get around. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. When they are locked into position, they wont wear further and cause issues down the road. [], I have 2007 5.3 its a new motor this truck scares me 9000.00 these trucks are jokes The original version sprayed oil on the cylinder walls and increased oil consumption. Remembered that after I bought my Tahoe. I ran 0W-20 no more the 5000 miles between changes. Looking forward to input from the forum, Thank you. Put everything back together proper torque, gakets, valve seals, etc. I had the same issue and had to have the AFM information deleted from the computer and the car tuned. Very expensive repair too! AFMengines use special lifters for cylinders 1, 4, 6, and 7. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. (Bought car 1 day before lifter died!) 190k on the motor always ran AMSOIL full synth since new. I have a 12 with 4.8 Silverado 75000 miles Most of the complaints show up in the 2009 to 2011 model years. is it still working good since you have done that with the trans fluid? Have a lifter problem on my 2010 5.3 Silverado. Chevy 5.3 Engine Problems Are They That Long-Lasting? - Motor Verso Better airflow reduces drag on the pistons and the associated pumping losses. 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. I want to put a AFM disabler in it what all do I need to have done. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. I service plenty of these vehicles with AFM, and the ones I have to open up the engine for repair because of a failure doesnt surprise me anymore. in your opinion will this work, i really dont see any reason it wouldnt. My 5.3 is. The LZ1 was upgraded with AFM and []. Cylinders two, three, and eight are all similar in cylinder deactivation. the vehicle has 120,000 on it and 30 to 60 psi of oil pressure never lower or higher. lol. [], I have a 2012 Silverado Z71 bought new. 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 []. What type of ODBII gadget did you use? There has been a lifter noise since I bought the truck 1 year ago. 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. Dont drive it if you have a dead cylinder due to afm failure. Below youll see references to the L99 as a result. changed oil , its all working now, but want to disable this sorry system. It came back on last Wednesday starting with a flash. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. Ive read at many websites that the GMCs envoys, Chevys and saabs did start to come with AFM in 2005 with the LH6 motor,It says here it started in 2006 on the saabs, then the pick-ups got AFM in 2007. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU.