There are a few potential causes for Chevy cylinder deactivation problems, including oil consumption problems, harmful to the environment, sludge issues, and lower cylinder temperatures. 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. Any help would be appreciated. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. GM Escalates Cylinder Deactivation With Dynamic Fuel - EngineLabs It was well researched and tested back in the late seventies and eighties . 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . When you eliminate the AFM system, the extra oil is no longer needed. There is a chance the cam lobe was stressed and started to deteriorate. Engines with AFM use a high-volume oil pump. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. 2 15 with 5.3 Sierras both with 100k and All Cylinders. After all we bailed them out of bankruptcy. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. Pulled right valve cover an rockers on syl 6 dont move. I have ordered an ATM disabler and will be putting a can of Textron in the gas at the next fill up. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. I had to replace them all and the camshaft as well. Can you tell me what needs to be done with the VVT? 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. I had a 2007 Yukon XL 5.3 with the AFM. 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. If I put my truck in manual 5, it doesnt try to go into V4 mode. Call chevy.They should being paying most of that. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? How do you know if the lifter has failed? We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? My fear now is not will it happen but when! Then again, it should have never been controlling those solenoids. This basically deactivates the cylinder deactivation system. The 2nd went with a conventional valvetrain. 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. 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). the body is in great shape. GM 6.2 Active Fuel Management Problems: What They Are and How - CarAraC I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. New plugs and wires. Really could use some pointers. Not sure which direction to go from here. Looking to tear down myself. Thank you. How to Delete or Disable Active Fuel Management (AFM) With 40000 bought at Brian Tooley Racing ! It had the AFM wiring & lifter cover installed with solenoid pack in the original engine, we even removed it to inspect. Engine oil pressure is fine. The motor I pulled was a 2007 LY5 with about 77k on it. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. 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. Id wait until the warranty expires then disable. Then had to drive the truck back to Tampa from Cheifland Fl. Clean oil is crucial. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. Told her that it would not last and that she needed to find a different way to get around. 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 . Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. Looking for another Toyota at this point to match my 1985 4 runner with 380.000 miles and no issues since new. . Excess oil will be pushed out of the pressure relief valve into the oil pan. While the system sounded good, the microprocessors scrambled to activate, deactivate, and then reactivate cylinders as driving conditions quickly changed, causing the car to hesitate, buck, and stall. I hate it. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. If under the truck while parked and it is doing it it sounds like it is towards the back of motor. What the biggest reported problem with Chevy Silverados? But then she passed away from cancer. At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Thanks. Fortunately I received a reducing in house shop hourly rate. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. If you think GM pioneered cylinder deactivation, guess again Then changed the oil. More information can be found in the GM TSB bulletin number 10-06-01-008g. If so what would the vin code be? 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 cant really tell from driving. Ive only put a straight pipe exhaust, intake, and a boost controller on it. 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. My point is that the engine likely on uses dod a small percentage of the time so can not really imagine that the delete causes any more issue than normal which may be the high oil consumption but do all of these engines with dod consume a lot of oil? 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? Cylinder misfires (most common sign) Rough idling, poor acceleration, loss of power Check engine light with engine misfire codes Air-to-fuel ratios are either running rich or lean The easiest way to tell that you have an injector problem is through the check engine light and engine codes for misfires. Yes a poor design but a flaw ? I ran 0W-20 on more the 5000 miles between changes. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. What type of ODBII gadget did you use? Oil 0w or 5w -20 How to Fix GM's Cylinder Deactivation Problems Hi my name is noel I am a mobile mechanic and I have a client that was having trouble with the lifters on a 2011 gmc yukon Denali 6.2 I placed the lifters after finishing I still had a problem with cylinder 8,6,3 rocker arms were not moving so I replaced the cam OEM part but still having miss fire on cylinder 6 what should I do to get rid of this problem, [] computer cannot switch over to four-cylinder mode. A bad lifter can be a minor repair if you get it fixed immediately after you hear an issue. [], [] LS Tech: How to Delete VVT or DisableAFM []. The Hit and Miss Nature of Cylinder Deactivation Systems Chevrolet Silverado 2014-Present: Common Problems Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. When you don't need the full power of the engine, it provides better fuel economy." There may be an ignition related issue on that cylinder. My question is: do I install the electronic disabler on the new engine to avoid future issues? If possible, will simply not using VVT provide a powerful,good running engine? The biggest difference between the Vortec engines that used to be found in Chevy and GMC vehicles and the EcoTec engines found in them now are the fueling methods. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? Hi Brian, A 14 gmc 5.3 Sierra 85000 miles Take a look at what bmw did in its R1250 bike. Just had my afm lifter fail had to drive 500 more miles home on 7 cylinders in my 6.0 lt chev. 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. 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. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). Had nothing but trouble out of it. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . When you drain the oil at three to four thousand miles its still clean. Love the truck. 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). But it also restricts passages that the oil runs through. I dont plan on installing the delete kit at this time. You could also have tried that if the trans oil didnt work. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Dod is the biggest failure sence the 8-6-4 caddie in 1981. The LZ1 was upgraded with AFM and []. I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. Whats the next step? [] they have a downside? Did not help. This is in response to pretty much everyone. 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. So I researched and got an AFM disabler. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. They learned that the oil level sensor was necessary and that we were supposed to have been advised that we needed to reuse the original oil pan. Thats not all bad because it saves the cost of an AFM delete kit. [], [] as the LS engine familys hybrid engine in trucks and SUVs. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. 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. Replacing engine due to issues caused by AFM. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. Any advice that you could offer would be great. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? 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! 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. Chevy 5.3 Engine Problems Are They That Long-Lasting? - Motor Verso Cant believe they havent fixed this in a decade. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Pulled the inntake and replaced valleypan With all the solenoids. 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. 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??? Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. Replaced all lifters. 330-630-0240. Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. He stated if I continued to exceed 4500 RPM it would blow the lifters out. Love the truck so far. I havent has any lifter or cam issues. All these comments on the 5.3 are blowing my mind!!!. the extra oil isnt needed. The problem I am facing is that I want to drive this vehicle for at lease another 77K and do not want to drive my vehicle with this AFM issue. My daughters car had about 230,000 miles when she complained of the problem. Ditto , never buy a throw away vehicle again is my recommendation and my fix . . It works . The computers had not evolved enough to control the sytem. Any thoughts or suggestions would be appreciated. My question on a 2007 Chevy Tahoe 5.3 AFM TheAFMcylinders are opposite of one another in the firing order. [], [] 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. what deleter (if thats a real word) have you heard good things about. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. There are so many more oil passages on engines these days. It seems this tough engine has everything incorporated into it. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. And consider using a higher grade of engine oil like Mobil 1 or Amsoil, etc. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Didnt change exhaust nor tune so likely no change in power/torque. In 2010, GM added a deflector (p/n) NAL-12639759 to redirect in into the pan. I have a noise in the engine but it seems to go away when revved up. I have already dropped a lot of money on this truck (08 suburban). The system uses solenoids to deliver oil pressure to control. Took it to a shop and they advised that it could be due to the AFM system not functioning properly. As the problem gets worse, youll hear a lifter tick and eventually you may see clearance between the pushrod and the rocker which will quickly destroy the cam. My 2011 Tahoe has a LMG motor in it with a build date of May 2011. Only thing I noticed with the oil consumption issue. Keith, were happy to help. Is there any potential down-side to doing this in other words, might this do more harm than good? Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. im going to plug in a dissabler when im done to keep it V8 mode all the time. 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 Problems regarding Chevy 5.3L engines ticking noise and misfire. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). 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). How did your turn out? I phoned the dealer and gave the VIN number, told it isnt equipped with AFM. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. Number 7 cylinder lifters stops moving when truck starts. Drives way better for my mostly paved road driving. Once the failure has occurred, the AFM shut off methods other than that probably wont work. Oil flows to the special lifters through theAFMtowers. All ready done valve job . Happened once 1yr ago, truck was not used for a week and worked fine when i started it back up. These trucks cost too much to have a terrible product. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley We chickened out though and just bolted the AFM solenoid plate onto the used engine. I called my service station and they told me to get it in ASAP. It was good for about 10 miles and started with same loud knock noise. Install the disabler when you get your Yukon back and it will remain in good working order. Pushing forward. The engine is running on only four cylinders. What would you do if you were in my situation? Because I want to. How about if they just let us have a manual transmission agains for fuel mileage? 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. Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Toyota has their own problems. I have a 2007 Yukon XL with the 5.3L and am planning to do this as my lifters have failed and it rattles loudly if it starts, and runs limp. 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. A tuner can often fix that as well by giving it some more ignition advance in these regions. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. Since no air can get in or out, four cylinders provide no power. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. 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. 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 call it active obama fuel management .A scam . I have read synthetic isnt good for AFM lifters. 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? Thank you again for the response. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. Im looking at the Range Disabler but want to make sure it is required/suggested/recommended/safe? Brian, 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. 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? [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); This site uses Akismet to reduce spam. Fouls those plugs. Open to suggestions about best course of action. 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). Run it and let it soak overnight. 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.