I traded in a 2004 4.8 L with 256000KM on it that ran like a clock and never gave me a problem. The engine is running on only four cylinders. You will get codes thrown if the afm is physically removed without telling the ECM you did so. This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. If you installed a factory truck cam, there shouldnt be any particular reason for it to be down on power. [] 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. I know a few guys with Tundras. Plug the tuner into your GM vehicle's OBDII diagnostic port, and follow the instructions provided to update the engine control module's program The new program will make sure that AFM never engages. 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. [], [] LS Tech: How to Delete VVT or DisableAFM []. 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. Just shut AFM off. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. This really sucks. Install ls3 valley cover. Regards, The trucks are only supposed to use two four. What type of ODBII gadget did you use? Dont drive it if you have a dead cylinder due to afm failure. Thanks for the detailed post! This is my second Avalanche and I never had any issues with either of them. It has has 9000 miles and no lifter or other issues or codes so far. Remembered that after I bought my Tahoe. 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. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. I cant stand seeing customers continuously going thousands of miles over on the oil and wonder why theres problems. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. Fortunately, the old engine hadnt been shipped back to the remanufacturer. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? I have already dropped a lot of money on this truck (08 suburban). Their tech guys have seen it all and may have some thoughts on this as well. I cant really tell from driving. What Is Hemi MDS? - MotorTrend When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. It depends on the failure mode of the lifter however, certainly worth a try. The wife however found this deal on an Envoy Denali . Lost number four Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. Active Fuel Management (AFM) is a trademarked General Motors technology that improves gas mileage by shutting down half of the cylinders under light-load conditions to reduce fuel consumption. Fuel pump failure is the most common problem and can occur due to a number of reasons, such as a clogged filter or a faulty pump. I know I felt the same way. How to Delete or Disable Active Fuel Management (AFM) on GM Engines Hello Mike, if you dont have any obvious signs like check engine lights etc., there are couple different possibilities. Given that, would you recommend buying one of the OBD-II devices to disable AFM? They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. Im curious as to how much tran fluid you put in? Thank you again for the response. Should I buy one to disable the V4 mode? Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. I quites down to nothing after running for about a minute. Its not GMs choice to use AFM. I have only put about 600 miles on it and noticed that the oil was a bit low and am hoping that it was that way when I picked it up. On the AFM lifters that dosnt work i have installed them With the oil hole Down! PDF Service Bulletin Bulletin No.: 20-NA-038 Date: March, 2020 Easier said than done. Question is, since my 2004 ECM and wiring harness were made before the AMF came about will this motor work properly as a V8 or will I need to replace the lifters, cam, oil sensor, etc as the delete method mentions? 2011 Chevy Avalanche LTZ. Disable Active Fuel Management - Ricks Free Auto Repair Advice I still get a P0336 code every once in a while but still good to drive around town. 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? Is this an issue only with GM SUVs and trucks, or does it include cars too? Chris, when you did your delete, did you also change the cam at the same time? Engine oil pressure is fine. It replaces the AFM components with standard parts. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. So I did the job one more time. Get this, rebuild is only rings and maybe lifters. Why this happens is a more . 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. Regarding the cylinder deactivation impact on fuel consumption . 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. Yes thats true. 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). Wed recommend a call to our partners at Summit Racing. Run it and let it soak overnight. GM claims fuel improvements ranging from 5%-15% depending on the engine. I wouldnt trade my 2000 Silverado, 5.3 liter that has constantly gotten 20 mpg since I bought it 15 years ago, for a dozen of these new $50,000 POS. Do you think I can still disable AFM? Another option is to plug it entirely if the AFM is already removed. In other words, the crankshaft and bearings were not visible. She drove it for another 35,000 and it went out again. All the time. Would you get enough power to drive at freeway speeds? General Motors has issued a service update for 2021 model year full-size truck and SUV models that are being shipped to dealerships and may be affected by valve lifter problems. Billy, there is some interesting trivia here on the L92. I ave noticed the point about excess oil spray. Is this the shield you referred to in a past post? Number 7 cylinder lifters stops moving when truck starts. It only has about 9k miles on it. Is the Pressure relief valve replaceable? Here's what you need to know: 1. 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. Shame this happened. Junk . I havent has any lifter or cam issues. The detergent. From what I am reading this would eliminate the possibility of failure, prevent false check engine lights and continue to make the appropriate power??? Problems After AFM Delete And How to Solve Them? - Tools Bible Everything else looked good. They are taller and have special oil holes. I hate it. Problems regarding Chevy 5.3L engines ticking noise and misfire. Is there any reaction to the disabler when pulling a boat or trailer? 2014 Chevy, GMC Pickups Recalled For Cylinder-Deactivation Issue The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. Fouls those plugs. Then had to drive the truck back to Tampa from Cheifland Fl. Are there errors or something only the dealer can clear? AFMis good for gas mileage and can be 5-7 percent more fuel-efficient under certain conditions. Have not had a problem yet. When you drain the oil at three to four thousand miles its still clean. The write up confuses me. []. Your email address will not be published. Regardless of the AFM solenoid being commanded on or off. I have a 12 wit 4.8 Silverado 75000 miles This is what I keep telling people. Looking to tear down myself. Another General Motors 5.3L V8 Lawsuit Filed | GM Authority RANGE TECNOLOGY.COM. []. How long did it take? I contacted service manager in Gastonia, NC and he was kind enough to tell me the whole history of the problem.. EPA required better fuel mileage and less emissions and GM, Ford and Honda(V-6) came up with this failed AFM system. Never did strand me on the side of the road way. I have a 2013 1500 with the LC9. Love the truck so far. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! bought at Brian Tooley Racing ! 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. I have been assuming this is just a slow to pump-up lifter or lifters. Its not possible to install them wrong? Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. [], I have a 2012 Silverado Z71 bought new. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . Cylinder Deactivation to the Rescue. I wii be using this truck to haul a camper for full time RV living and am thinking of a tuner to shut off AFM and maximize performance and economy. 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. im going to plug in a dissabler when im done to keep it V8 mode all the time. I have also heard that the oil pump is to be changed and I have also heard that it does not matter. If so what would the vin code be? There is a note in the TSB that states the bulletin doesnt apply to the LH6 used in the Rainier, Trailblazer, and Envoy due to a different design oil pan and AFM relief valve. Is there any potential down-side to doing this in other words, might this do more harm than good? 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. "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. Put everything back together proper torque, gakets, valve seals, etc. 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 ! of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. The LZ1 was upgraded with AFM and []. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. 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. If a lifter has already started to fail, an AFM delete kit and non-AFM components are the way to go. It has 8,000 miles on it. Welcome to socialism folks . The problem:. Thats not all bad because it saves the cost of an AFM delete kit. I am leaning heavily on installing the AFM disabler. GM get a clue! The 1 Big Problem People Are Having With the Chevy Silverado - MotorBiscuit I have an 07 Yukon with over 180K. Batten, followed by several years developing performance pistons at Wiseco Piston Co. Today, Brian develops performance parts for Summit Racing Equipment and is a regular OnAllCylinders contributor. No problems with any to this point. 5.3-liter Chevy Engine Problems: What Should You Look Out For? Because its not just GM that have engine problems. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. 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? Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. Removing ignition lock cylinder when it won't turn at all TheAFMsystem can be identified by its components. This system was originally used in early 1980s Cadillacs. I guess I might have to call a dealership or GM to get a definite answer on this one. I recently bought a 2018 Silverado 5.3L with AFM. The 2016+ Tacomas are junk. Its got a hundred forty-five thousand miles on it. Engines with AFM use a high-volume oil pump. [] swaps come with an extra step or two thanks to the Generals fuel efficiency efforts (VVT and AFM). I bought a 2010 GMC Sierra 5.3L Truck in 2013 with 24K miles. One must anticipate this. Yes, always change all the lifters at once. It has the orings in place, that seals the towers. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. 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. No movement on the rocker arms. hi brian when you replace the lifters do you have to change the guides also? Drives way better for my mostly paved road driving. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. The result is improved combustion chamber pressure as the piston approaches top . That inherently less smooth operation requires additional NVH dampening. Chevy 5.3 Engine Problems (Gen 4) #3: Spark Plug Failure. But after reading this thread, Im a little concerned about the long-term reliability. Once the failure has occurred, the AFM shut off methods other than that probably wont work. 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. GM Dynamic Fuel Management Cylinder Deactivation Technology - GM Authority My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. When cruising on the freeway (for example) in 4 cylinder mode and jumping on the throttle to pass or get out in the fast lane, there is CONSIDERABLE and annoying and dangerous lag, like 3 seconds, and this is a problem. I dont plan on installing the delete kit at this time. 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. Have an intake and Borla exhaust. I can literally drive from Seattle to Redding CA on one tank. Ill Never Ever buy another gm. 2 15 with 5.3 Sierras both with 100k and 2 15 with 5.3 Sierras both with 100k and Below youll see references to the L99 as a result. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. There has been a lifter noise since I bought the truck 1 year ago. Having a hard time finding one .. We were getting a code that the cam position sensor was not functioning properly. Friend will send to me from Arizona. 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? It is replaceable.. just remove oil pan and it will be on top at the filter. I would. Thank you. 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. It works . I got the AMF disabler anyway and so far so good. The owner of the vehicle has apparently owned a few of these vehicles and stated that this vehicle doesnt have AFMnever did? Also putting in a new transmission vs. rebuilding. Looking forward to input from the forum, Thank you. If you already own this engine you will need to deactivate the AFM system or even better DO NOT buy any GM vehicle with this engine. In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. The dealer in Rockhill, SC when asked only said they had not had a problem. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. I read something the other day which I found to be funny. Its Chrysler and Ford. Cylinder Deactivation: What Is It and How Does It Help Save Fuel? This new lawsuit is essentially identical to the previous. How did your turn out? https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1.

Seaver Funeral Home Princeton Wv Obituaries Today, 355 Taper Tip Graphite Iron Shafts, Primrose School Holiday Schedule, Police Chase In Ontario California, Articles G