gm cylinder deactivation problems gm cylinder deactivation problems

Getting ready to diy for $450. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. 2018 new truck has me really disgusted If I had checked this out better, there would have been one less POS Chevy sold last year ! The market for nonhybrid gasoline-powered vehicles is expected to fall by 20 percent during that time, but with tech like smarter cylinder deactivationin these upcoming GM V-8 trucks, for . But not sure very annoying. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. With 40000 But the problem at that time was the computer technology. Im curious as to how much tran fluid you put in? If you installed a performance cam intended for a car, it may be bleeding off some low end compression. I recently bought a low mileage 2013 Silverado and the lifters collapsed. I am hoping this does the trick. Can I (should I) also change to a standard volume oil pump? 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. Is this an issue only with GM SUVs and trucks, or does it include cars too? Any thoughts or suggestions would be appreciated. Friend will send to me from Arizona. I had a 2007 Yukon XL 5.3 with the AFM. I have a Yukon 116k it now needs its 3rd set of lifters and cam. I would appreciate any feedback. .or something similar . 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. How did your turn out? I tried the trans fluid in the oil. The motor I pulled was a 2007 LY5 with about 77k on it. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Ive only put a straight pipe exhaust, intake, and a boost controller on it. Only thing I noticed with the oil consumption issue. 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. 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. . My 2002 I had over 298K on it with no engine related issues. . I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. It depends on the failure mode of the lifter however, certainly worth a try. I also notice that it doesnt go into V4 when it is cold. 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. Any guidance would surely be appreciated. Glad I did. Hopefully more is known by then. Keith, were happy to help. Sylinder one lost compression on my 09 5,3. Where can I buy a bolt to replace this relief valve ?? Now I get 24 to 26 with deactivation locked out and full power. If the lifter actually fails so that the mechanism wont release, it wont work. Teflon coatings does not last. so the trans fluid worked for you then? WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. I wont bother with blocking the relief valve. 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 []. Would installing the Disabler solve this? It is being covered under warranty since I only have 72,000 miles on it. I sold them when they were new. is it still working good since you have done that with the trans fluid? It will show up as a misfire code in a cylinders 1,4,6, or 7. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] I guess what Im really trying to ask is,, are there any cons/disadvantages to installing the AFM delete Electronic module? 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. GM switched over to the 4100 v-8 in 1982. I have an 07 Silverado 1500 ltz. 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. The main misconception is that shutting down half the engine's cylinders reduces fuel consumption because the . Hello. If you swapped in a LS9 cam, you will find it makes good power at the very top, but its actually down from 5,000 rpm and lower where the truck spends the majority of its time. The LZ1 was upgraded with AFM and []. This system was originally used in early 1980s Cadillacs. Double digit MPGs in my 98 K1500 would be a dream lmao. Required fields are marked *. The oil is baked on to every component. My 5.3 has a vin code of O. [], [] as the LS engine familys hybrid engine in trucks and SUVs. 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? I know I felt the same way. I have a 2011 GMC Sierra 1500 with the 5.3. But then she passed away from cancer. Call chevy.They should being paying most of that. 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. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. Seems like the AFM disabler device is working for a number of people including myself as the 5.3l AFM engine has inherent design faults. The wife however found this deal on an Envoy Denali . $8500.00 fix. It was well researched and tested back in the late seventies and eighties . Plugs spark fine engine has power at higher RPMs although it is still in Limp mode / stabilitrack message, even after driving it a few times above 60 MPH then clearing errors with handheld programmer. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. No other V-8 truck of similar weight can do that (except another GM with AFM). A 17 with 5.3. Then again, it should have never been controlling those solenoids. No movement on the rocker arms. Put everything back together proper torque, gakets, valve seals, etc. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. 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. Its not possible to install them wrong? Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. misfire or anything. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. Then changed the oil. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. The car runs great apart from the shuddering at those speeds. Every one of these engine will have a lifter fail, this is a travesty! Its ribbed with solenoids on the underside. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. 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. 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. My fear now is not will it happen but when! A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. This reduces expense when you build it [], [] intake, and a cable-driven throttle body, plus Im also installing Trick Flows VVT and AFM delete kits. The system uses solenoids to deliver oil pressure to control. Having it fixed now, just curious Seems like a problematic design. Cylinder deactivation--branded Active Fuel Management by GM--shuts off some cylinders when extra power isn't needed, to improve fuel economy. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. There is no light on my dash or anything that indicates the system is active or exists, so its very confusing, Im still not sure if my vehicle has it or not. I have no clue what to do now. they are known to become plugged. No it runs fine on sylinder one but not on 6 or 7!!! 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. Engine starts but is throwing a misfire on cyls 4,7. In four-cylinder mode, they act like air springs and allow for smooth operation. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. There is a good chance that some of the drivers side lifters decided to go. Replaced all 16 lifters due to collapsed lifter on CYl #4. For fun, he runs his 427-powered C5 Z06 in ECTA land-speed racing, at OPTIMA street car events, and at a mix of autocross, drag racing, and track days. the body is in great shape. The most common issue GM vehicle owners with AFM report is increased fuel consumption. He claims that GM used the same engine whether it was or was not equipped with AFM in this year and model? .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. Im servicing a 2011 Chevrolet 5.3 with AFM. whith a disabler. We were getting a code that the cam position sensor was not functioning properly. No other truck my ass .lol my 99 silverado 1500 with the junk LR4 4.8l and 320k miles 9n itgets 21mpg all day long with 93 octane gas in it. So I did the job one more time. I will be installing the AFM deactivator tonight when I get hoe. It has has 9000 miles and no lifter or other issues or codes so far. 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? Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? I had to replace them all and the camshaft as well. Mine did at the exact same time. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. 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. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . I am not in a position to have a new cam and lifters installed but Im also not in a position to not having a running truck! It also mentions a valve cover replacement with revised PCV valve design. 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. has 92,000 miles and was just told I have cam and lifter failure. Thanks for the advice Brian! I have a 12 wit 4.8 Silverado 75000 miles Junk . Solenoids, new lifters also test voltage to solenoid pack all good their, 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. This should be added to your earlier model if you experience oil consumption. Most will want to get rid of the AFM immediately. Replaced all lifters. 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 1. You can monitor the oil level on your dipstick for 3,000 miles to determine if the deflector or plug would be needed, but chances are you wont based on the TSB. i just bought a 2018 Silverado with the 5.3 [] they have a downside? The trucks are only supposed to use two four. 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. This happened on a camping trip with my kids last friday night. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? (Bought car 1 day before lifter died!) NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. This is in response to pretty much everyone. I wear hearing aids, but I thought I heard more engine noises, but after checking the gas cap, the light went out for a week. 1981 Cadillac V 864. Brian, thank you for the quick response. At this state, a disabler would probably do what you need it to do. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. My question is: do I install the electronic disabler on the new engine to avoid future issues? Having a hard time finding one .. any help? [] Here is a guide on how to turn off AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Guide to disabling AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] Here is an article on how to deactivate AFM. will feel like a jerk asking the clerk at lowes to cut them again. Thanks. I hate it. Because I want to. However, the fuel savings are not always as much as expected. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. 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. Once I get it back, could I install the Disabler safely. They lasted one year with big problems. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM 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. Then it takes out the lifter again and again until you bite the bullet and replace the cam. If you ignore it and keep driving, odds are you will destroy the cam as well. What makes you think it was a design flaw ? Have there been improvements in more recent model years employing AFM [2014 or newer]? RANGE TECNOLOGY.COM. Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? I have no other engine problems and Id like to fix the issue. I would. Because its not just GM that have engine problems. Toyota has their own problems. Traded it with 180K miles and did not experience any problems. 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. My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. thx Brian, Knock on wood I drive a 2011 silverado 44 Ltd with the 5.3 AFM/DOD not tuned out or delete being used and have experienced no problems or any sign of problems for that matter juat rolled over 210,000 all original factory parts would you suggest I tune it out or juat let it ride I change my oil religiously and also use lucas products for all aspects of my motor. lol. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? 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. Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. There are so many moving components in an engine these days as opposed to the past. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. Corvette that does employ AFM. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. A tuner can often fix that as well by giving it some more ignition advance in these regions. [] 5.3L engines start in the $600-$1,000 range and go up to a little more than $2,000 for the 6.0L and 6.2L engines. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. One must anticipate this. in your opinion will this work, i really dont see any reason it wouldnt. My 2012 Silverado 5.3L just did the same thing as your Tahoe Brian. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! Still have no power. It has AMF. Should I buy one to disable the V4 mode? Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? I have a noise in the engine but it seems to go away when revved up. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. Most of the complaints show up in the 2009 to 2011 model years. No problems with any to this point. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. 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. This really sucks. Im a little confused on the problems too, Im reading that the 2007 pick-ups with 5.3 really had bad oil consumption and plug fouling problems, but is the 2005 5.3 that came in the trailblazers, envoys, and sabb 9-7s the exact same design as these pick-ups and prone to the same failures? Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? Its not GMs choice to use AFM. Bought an 07 GMC Yukon 5.3 with the AFM, 87k. TheAFMsystem can be identified by its components. It has the orings in place, that seals the towers. Love the truck so far. Another option is to plug it entirely if the AFM is already removed. Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. I dont plan on installing the delete kit at this time. Now the problems back, I have 180k miles on it now. It uses a M14 x 1.5 thread plug like Dorman 65217. The tune is the best bang for the buck outside a cam swap anyway and what Id recommend. Easier said than done. [], [] LS Tech: How to Delete VVT or DisableAFM []. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of .