gm cylinder deactivation problems

gm cylinder deactivation problems

The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. It is usually first noticed during highway driving. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Now I know why there wa such a push to get older ,less efficient vehicles off the roads. Any help would be appreciated. Dave, I also have a 2008 LTZ avalanche with 106,000 I have the exact same symptoms at this point I just want to sell it will the disabler help remove the check engine light wont pass inspection with light on thanks for your help Chris. I couldnt agree with you less, yet I respect your opinions. .IMHO . Dont want to make a move on a new truck or jump to a 2500 yet. the extra oil isnt needed. Once the failure has occurred, the AFM shut off methods other than that probably wont work. Happened to me twice 2009 Silverado, finally deleted DOD and installed a performance cam and lifters. There may be an ignition related issue on that cylinder. I loved this rtuck until this happened!! I had #4 lifter stick and now i am looking at replacing the engine with a non-dod version. TheAFMsystem can be identified by its components. You are correct. Can they be faulty? Pulled the inntake and replaced valleypan With all the solenoids. "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. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. The computers had not evolved enough to control the sytem. 1. Cylinders two, three, and eight are all similar in cylinder deactivation. misfire or anything. Can you tell me what needs to be done with the VVT? This new lawsuit is essentially identical to the previous. I bought a 2010 GMC Sierra 5.3L Truck in 2013 with 24K miles. 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. 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. Brian, TheAFMcylinders are opposite of one another in the firing order. All New lifters were from AC delco. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. I ran 0W-20 no more the 5000 miles between changes. Get this, rebuild is only rings and maybe lifters. This is what I keep telling people. GM switched over to the 4100 v-8 in 1982. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. This system is the most effective way to disable AFM. they are known to become plugged. Thanks for the detailed post! AFMengines use special lifters for cylinders 1, 4, 6, and 7. It is being covered under warranty since I only have 72,000 miles on it. Next day I drove my car to work and was fine but when I left work all lights came back on and terrible noise in the hood. Ive only put a straight pipe exhaust, intake, and a boost controller on it. I have a 2007 Gmc Envoy Denali with LH6 cant find a good LH6 engine but I found a 2011 LC9 engine w 52000 miles will everything plug up or what am I getting into? Ive been a Ford guy my whole life, so I was unaware of AFM until a recent trip where I did a lot of highway driving and happened to bring up the real-time mpg display, where I saw it switch between V6 and V4. Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. I would just have the AFM disabled (tuned out) then. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. 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. 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. Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? 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? Put everything back together proper torque, gakets, valve seals, etc. The Jury is still out on the Gen. 5s but the warranty could be an issue. If you left the original cam in, the AFM cylinders will be down about 25 lbs. [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. Below youll see references to the L99 as a result. Seafoam with syn oil change only fixed for a week. Here's what you need to know: 1. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Engine oil pressure is fine. do you fill to capacity anyways???? 330-630-0240. Should I buy one to disable the V4 mode? 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? She started to have the lifter problem again after 60,000 miles more. The exhaust valve remains open during the intake stroke and closes just before BDC. The LZ1 was upgraded with AFM and []. When you don't need the full power of the engine, it provides better fuel economy." I got the AMF disabler anyway and so far so good. The problem:. Found that all passenger side cylinders are not firing. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. Well, they move a couple of times after startup thats all.Asume its the same on syl 7 on the other side.Disconected the Connector to the solenoids, no difference. Active Fuel Management (formerly known as displacement on demand (DoD)) is a trademarked name for the automobile variable displacement technology from General Motors.It allows a V6 or V8 engine to "turn off" half of the cylinders under light-load conditions to improve fuel economy.Estimated performance on EPA tests shows a 5.5-7.5% improvement in fuel economy. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. . If I were to put a 2006 5.3L in a 2007 Avalanche and buy the unit to plug into my OBD2 port would it work? I asked my local Chevy dealer, from whom I purchased the engine, to find out why the oil pan lacked the fitting. It prevents the computer from switching over to four-cylinder mode. They layed over night in engine oil before instalation. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. After reading these forums Im a little concerned about my decision to stay with GM. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. [], [] LS Tech: How to Delete VVT or DisableAFM []. What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? Didnt really notice a loss in power other than the surging, (wondering if thats the engine trying to switch between 4 and 8 cylinders). Its Chrysler and Ford. Did gm make a non-dod version of the 5.3 with iron block that would work in my application? Driver reported this occurred suddenly while driving down the highway. I can literally drive from Seattle to Redding CA on one tank. My Wifes 17 Buick with afm was my attempt to get back to gm. Disable the afm. Number 7 cylinder lifters stops moving when truck starts. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . I have a 2011 GMC with over 162,000 miles on it and it runs great! Open to suggestions about best course of action. Does the Pressure relief vavle ever go bad?? He unstuck it and I took it for a drive and same thing happened. I have 1999 5.3 Silverado that gets 19-20 miles to the gallon all the time this shit pile with dod only gets 14 miles to the gallon. Only running on drivers side cylinders. 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? Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Im confused from the write up about the plug in. I don know what else would cause the surge, but Id research the misfire code and see which cylinder is problematic. 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. Then again, it should have never been controlling those solenoids. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. If a shop pulled a DTC code P0300 and found AFM to be the issue, it may not be too late to try the disabler. HP tuners is not for someone like me that doesnt know how to use it and from what I read neither the range nor diablo plug and play device will work since the buicks pcm files are different than all other GM vehicles that came with afm because it was tuned in house at gms performance division. Change your oil. Every one of these engine will have a lifter fail, this is a travesty! I am considering the same. What type of ODBII gadget did you use? 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. Cost about $250, but it is not fool proof. Would installing the Disabler solve this? will feel like a jerk asking the clerk at lowes to cut them again. This valve is located on the oil pan rail and prevents excessive oil pressure from negatively impacting the AFM components. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. So for all of you that continue to complain about how bad these things are. 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. I was looking at the 08 escalade hybrid with dod on its 6.0 so wondering if the delete would contribute to the high oil consumption and therefore would adding the deflector be a good idea. Remembered that after I bought my Tahoe. Thanks. Have a lifter problem on my 2010 5.3 Silverado. As a side note, the early ones had a 24x reluctor and plastic chain guide (good) vs. the later ones with 58x and the spring loaded tensioner (not so good). A 17 with 5.3. I could just transfer over the AFM lifter cover, but it is really nasty on the bottom side & I do not want to risk damaging this replacement engine if it is loaded with debris from the lifter & camshaft failure. 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. Clean oil is crucial. 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. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. I was told that before I start the vehicle up I will need to have the AFM and VVT disabled in the ECU but that would require a custom tune from a tuner as the ECU cannot just be told that the AFM and the VVT is gone. 2 15 with 5.3 Sierras both with 100k and 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. The most common issue GM vehicle owners with AFM report is increased fuel consumption. 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. Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Chevrolet 5.3 Engine Issues and Recommendations I have no other engine problems and Id like to fix the issue. Or is the shuddering indicative of failed/failing lifters that need to be replaced before moving forward? 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. A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . 2015 SILVERADO 1500 44 crew cab with 5.3L engine: So two weeks ago with approx 70K miles, I had an odd noise when accelerating and then engine light flashing and riding rough. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Are you saying that I am in the clear by a year and issues fixed? Can I (should I) also change to a standard volume oil pump? thank You so much! My question on a 2007 Chevy Tahoe 5.3 AFM Took it in this morning and mechanic said cylinder 6 misfire, he said the lifter hasnt failed. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . This replacement engine has the same camshaft sensor plug plug, 5 wire like the AFM would use, instead of the 3 wire. Is this due to the AFM being shut off? Now the problems back, I have 180k miles on it now. Where can I buy a bolt to replace this relief valve ?? Any truth to that? The trucks are only supposed to use two four. You also need the disabler installed in your obd connector. When you drain the oil at three to four thousand miles its still clean. It also has an electrical connector on the back. I already ordered the parts to replace myself and remove the code. Who knew? If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? I have been assuming this is just a slow to pump-up lifter or lifters. With 40000 Have there been improvements in more recent model years employing AFM [2014 or newer]? You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. There are no changes in the valves or the springs. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. Had similar problems under warranty, no telling what they rigged me up with at the dealer. in your opinion will this work, i really dont see any reason it wouldnt. Because your Saab is mechanically similar to the Trailblazer, wed suggest that you are correct and no changes need to be made to the relief valve. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. 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. On one hand it has an aluminum block, which is nice. Verified over hundreds of trips, makes no sense. Everything was fine for two weeks, ow customer complains s it same noise it made as before. There are 5.3 cylinder deactivation problems that can occur. This is my second Avalanche and I never had any issues with either of them. Wow, thanks for the wisdom,, i checked my VIN Code (position #8, M=LH6) and my 2005 Saab 9-7x does have the LH6 motor with iron block, Are you sure its only 2007 & newer motors? 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. Your email address will not be published. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. [] 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 []. Some drivers want V8 power under their foot at all times. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. 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). The biggest problem is nobody changes their oil on time. Chris, when you did your delete, did you also change the cam at the same time? I am trying to prevent same issue. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). There is a filter screen under the oil pressure sender that may be clogged and not getting enough oil to supply the solenoids. It has plenty of oil pressure and I put all new lifters in it. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). Oil 0w or 5w -20 Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. I had a 2007 Yukon XL 5.3 with the AFM. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. The original version sprayed oil on the cylinder walls and increased oil consumption. I speak from some experience. I noticed this discussion mainly addresses Chevy Silverados and other trucks? What can I expect with the AFM in place, or, with AFM disabled (not deleted)? As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. Hello! It essentially turns your V8 engine into a V4 which saves fuel. Looking to tear down myself. Yes thats true. . 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 ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. Deactivating cylinders at light load forces the throttle valve be opened more fully to create constant power, and allows the engine to breathe easier. After all we bailed them out of bankruptcy. Any advice that you could offer would be great. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. Just recently, GM announced a temporary closure. I am having that done today on my 08 Suburban and its only costing me $225. It has has 9000 miles and no lifter or other issues or codes so far. Why this happens is a more . Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. Or not because it is the cast iron block and not he aluminum block? Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. Regardless of the AFM solenoid being commanded on or off. My concern is if I leave the non-AFM lifter cover in place & have nothing to plug the 5 pin AFM solenoid connector into, will I get a MIL? https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. [], [] way. RANGE TECNOLOGY.COM. 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? The result is improved combustion chamber pressure as the piston approaches top . I have a 2011 GMC Sierra 1500 with the 5.3. My 5.3 has a vin code of O. Double digit MPGs in my 98 K1500 would be a dream lmao. Carbon Build-Up in the Intake Ports. I just got new warranty engine and dont want this issue again? Theyre also notorious for bad cam tower oil leaks. Ive been reading, with disgust and concern of the lifter/cam situation. Our 2013 yukon with 47k miles just failed. Any problems to watch out for?Did you replace the VLOM? I have already dropped a lot of money on this truck (08 suburban). If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. Im always sorry to hear when people run into issues like these. 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. GM uses 3 different styles all are engine specific. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. How about if they just let us have a manual transmission agains for fuel mileage? Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. i just bought a 2018 Silverado with the 5.3 At this state, a disabler would probably do what you need it to do. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. Take a look at what bmw did in its R1250 bike. Solenoids, new lifters also test voltage to solenoid pack all good their, Then I guess I have to spend a bunch of money and get the delete kit. Why would GM ever produce such problems with such little to gain. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. As you said, the ECM was never seeing the AFM so I think youre good to go. 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. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. Didnt change exhaust nor tune so likely no change in power/torque. 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. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. General motors sent out a service bulletins to their dealers however, all dealers will not tell you about the bulletin. There are so many more oil passages on engines these days. is it still working good since you have done that with the trans fluid? NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades. There is a good chance that some of the drivers side lifters decided to go. There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit. Replaced all 16 lifters due to collapsed lifter on CYl #4. It does seem that when they start goingthey go quickly. NOTE: A disabler device should ONLY be used if the valvetrain is in good working order. I am leaning heavily on installing the AFM disabler. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy What the biggest reported problem with Chevy Silverados? No movement on the rocker arms. I know I felt the same way. Drives way better for my mostly paved road driving. 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.

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