Is there any reaction to the disabler when pulling a boat or trailer? Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! I wont bother with blocking the relief valve. These trucks cost too much to have a terrible product. Another option is to plug it entirely if the AFM is already removed. There are so many moving components in an engine these days as opposed to the past. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! Put everything back together proper torque, gakets, valve seals, etc. 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. Would it be fine to go ahead with the AFM Disabler? Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. I recently took a long trip and it burned 1.5 quarts of oil. 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. I drive the same 320 mile trip every two weeks and drive the same route and full tank. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. The 5 Most Common Chevy EcoTec3 5.3L Engine Problems With 44, its a enormous Jon to remove the oil pan. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. The biggest problem is nobody changes their oil on time. 91 GMC Sierra K1500 F44 6.2 NA Plow truck with 7.5ft Leo Plow 94 K3500 CC DRW 6.5TD DE exhaust . You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. Thank you again for the response. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. This is in response to pretty much everyone. If you think GM pioneered cylinder deactivation, guess again Would doing the disabler option once I get it back be the right one? I had one fail and it chattered the cam to the point that I had to Install a new cam. Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. My ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. I just took a long trip and it used 1.5 quarts of oil. will feel like a jerk asking the clerk at lowes to cut them again. [], [] way. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. it is the regulator guy! All New lifters were from AC delco. I would rather stay a V8 full time than deal with AFM issues in the future. Diablo says yes but they do not provide tunes. Is this the shield you referred to in a past post? It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. $8500.00 fix. 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. In the mean-time I found that you can keep the engine from going into 4 cyl mode by using the manual shift (if so equipped) and keeping it out of 6th gear. Wed recommend a call to our partners at Summit Racing. 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. Is this due to the AFM being shut off? 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). What if the pressure relief valve is stuck OPEN and the oil pressure never gets up to where it needs to be? Anyway that horrible experiment was in the late 70s early 80s along with those converted Diesel engines..those like the 8-6-4 nonsense were just terrible failures. I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. You will get codes thrown if the afm is physically removed without telling the ECM you did so. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. When they are locked into position, they wont wear further and cause issues down the road. Thanks. I also notice that it doesnt go into V4 when it is cold. AFM/DFM Disabler - Range Technology If AFM has been deleted, its common just to use a Dorman drain plug (m14 x 1.5) to remove the pressure relief valve entirely. 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. thank You so much! You are correct. 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. We believe this confirmed that the AFM has never been operating in this vehicle. Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. Cylinder Deactivation: What Is It and How Does It Help Save Fuel? Constant engine and transmission problems. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . The only solution is to replace the entire cylinder head. I would appreciate it if you let me know how you make out. 2012 5.3 Tahoe AFM, #4 lifter collapse,replaced all lifters,started engine ran ok, then rough, got #6 misfire code. To do this, you need to leave the AFM solenoid pack connected to ensure no codes are thrown. Why cant you stop the send signals from the computer so that the solenoids dont open and the AFM system is never engaged? Bought an 07 GMC Yukon 5.3 with the AFM, 87k. Don't even get me started on the shortened life of the cooling, starting and charging systems. Also replaced push rods rocker arms and rocker plate guide because if wore push rod and crack in rocker arm. This is what I keep telling people. I would say maybe 5% of my customers keep up on their oil changes. All the time. so the trans fluid worked for you then? I know a few guys with Tundras. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. We are looking into the AFM Disabler option, but my question is- how do we know if a lifter is already bad or not? [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. What type of disabler did you go with? My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. This should be added to your earlier model if you experience oil consumption. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Covers me to 100K. Can you tell me what needs to be done with the VVT? 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. Chevy Silverado V8 To V4 Problems - Tools Bible Will the plug in deactivater fix the oil consumption or will it cause more consumption? Seems my oil pressure sensor is bad, are showing the same oil pressure at all times, even when it dosnt run.Dont know it that fault was there before i replaced the lifters. Any truth to that? He stated if I continued to exceed 4500 RPM it would blow the lifters out. Do not pay that amount. Install an AFM Delete Kit A V8 firing all 8 cylinders sees 90 degrees between combustion events, while a 4 cylinder engine lengthens this to 180 degrees. 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. In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. AFM - active fuel management strategy which deactivates the lifters on specific . Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. If Problems regarding Chevy 5.3L engines, if the running compression of the misfiring cylinders stays below 25 PSI. 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. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. I couldnt agree with you less, yet I respect your opinions. Is this an issue only with GM SUVs and trucks, or does it include cars too? stalled in a certain way a warning wouldn be a bad idea. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo Right now I have just over 77K miles with no lifter problems Knock on wood I am thinking of the AFM disabler. Most of the complaints show up in the 2009 to 2011 model years. . It was good for about 10 miles and started with same loud knock noise. Most of all, my concern is reliability. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. Everything was fine for two weeks, ow customer complains s it same noise it made as before. put tran fluid in oil for a day till lifter became active, had to change the fouled plug. Heres what you need to know: An AFM Delete Kit is recommended when an AFM lifter fails or when doing performance upgrades. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Ayush Srivastava Are you saying that I am in the clear by a year and issues fixed? I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. I have 1999 Silverado with out AFM that gets 21 mpg and a 2008 with it that gets 14.6. You mentioned that it will shoot oil into the pan and on the cylinder walls possibly causing some oil consumption So i have a running vehicle and my only concern is making it as reliable as possible, should I disable the AFM or not?? .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. My fear now is not will it happen but when! Very expensive repair too! A tuner can often fix that as well by giving it some more ignition advance in these regions. 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). According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Disable the afm. The problem:. GM Releases Valve Lifter Service Update For V8 Engines I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). Fouls those plugs. in your opinion will this work, i really dont see any reason it wouldnt. How did your turn out? 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. Then I guess I have to spend a bunch of money and get the delete kit. Then again, it should have never been controlling those solenoids. A 17 with 5.3. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. Most will want to get rid of the AFM immediately and VVT isnt for []. 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. So for all of you that continue to complain about how bad these things are. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. It was in the late 70s or early 80s and it was a POS, Your memory serves you pretty well I too have the same nightmares lol. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. Why this happens is a more . Is the Pressure relief valve replaceable? There is no way cylinder deactivation and the resulting temperate decrease, with sudden piston heat expansion when all cylinders are engaged, can't have undo wear and tear on the rings, valves, piston and bore. There may be an ignition related issue on that cylinder. Stop-start cylinder deactivation, direct injection, variable valve timing, thermal management, and continuously variable oil pump; are just some of the Silverado features of . Get this, rebuild is only rings and maybe lifters. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . How about if they just let us have a manual transmission agains for fuel mileage? With 40000 The older truck gets 19 mpg the newer truck with fuel management gets 14. I had privilege to work on some of that garbage they never did work . Remembered that after I bought my Tahoe. I just did the delete and replaced the cam as well. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. [], [] as the LS engine familys hybrid engine in trucks and SUVs. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. 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. Hi Grant is that disabler still working for you ? Told her that it would not last and that she needed to find a different way to get around. https://www.cargurus.com/Cars/Discussion-t30884_ds822284. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. 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. Thank you. 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. They dont so any better than domestics on mpgs. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. I already ordered the parts to replace myself and remove the code. 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 will keep reading and take notes. Given maximum engine power is not required during the majority of everyday driving, AFM works to deactivate engine cylinders when they are not needed, such as when cruising on the highway, thus. GM Making New Trucks Without Cylinder Deactivation Due To Chip - Motor1 .IMHO . My 5.3 has a vin code of O. The result is improved combustion chamber pressure as the piston approaches top . Its got a hundred forty-five thousand miles on it. What the biggest reported problem with Chevy Silverados? That inherently less smooth operation requires additional NVH dampening. How to Deactivate AFM, DFM, MDS, and Start/Stop To Prevent - Holley Some guys have been able to use a tool through the top with the cover off to get it to release. Given that, would you recommend buying one of the OBD-II devices to disable AFM? However, the fuel savings are not always as much as expected. The wife however found this deal on an Envoy Denali . Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. GM switched over to the 4100 v-8 in 1982. . 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. Run it and let it soak overnight. You also need the disabler installed in your obd connector. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. This update also saw the usage of cylinder deactivation technology or Active Fuel Management. I hate it. Ill Never Ever buy another gm. 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! She started to have the lifter problem again after 60,000 miles more. The 2nd went with a conventional valvetrain. 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. Does the disabler prevent the engine damage in the first place? Unfortunately because of emission standards nowadays, manufacturers cant go back to those style of engines. AFM or active fuel management is a GM/Chevy technology meant to improve gas mileage. The oil collapses the plunger inside the lifter. Definitely dont want to do anything to fix one problem and create another. Getting ready to diy for $450. After taking a $3.6h bath on the lifter/valve work and doing a little research, how can GM allow a problem like this AFM continue from 07 to present? At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority In four-cylinder mode, they act like air springs and allow for smooth operation. With 40000 Your email address will not be published. How to Delete or Disable Active Fuel Management (AFM) on GM Engines 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. I called my service station and they told me to get it in ASAP. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Fortunately I received a reducing in house shop hourly rate. The engine will switch to operating on fewer cylinders when cruising at a constant speed. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. Ive been reading, with disgust and concern of the lifter/cam situation. The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. Toyota will be my next truck unless GM owns up and makes wright with consumers. 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. But not sure very annoying. All these comments on the 5.3 are blowing my mind!!!. 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. I have a 2012 Chevy Avalanche. If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). My question on a 2007 Chevy Tahoe 5.3 AFM Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy also in the pan is another AFM oil filter near the external engine oil filter. At this state, a disabler would probably do what you need it to do. Call chevy.They should being paying most of that. Their tech guys have seen it all and may have some thoughts on this as well. The engine also had 799 or 243 casting heads which are closely related to the LS6. Then changed the oil. Hello. I guess I might have to call a dealership or GM to get a definite answer on this one. Just pulled it down in the garage there was no other damage , luckily. Love the truck. The Service Traction Control and Check Engine lights also came on again but went out after a few minutes. I ran 0W-20 on more the 5000 miles between changes.