gm cylinder deactivation problems

I bought a new 2017 Cadillac CTS back in January 3.6L V6 with 8-speed trans. If I had wanted a 4 banger I would have bought one. The engine will switch to operating on fewer cylinders when cruising at a constant speed. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. I still get a P0336 code every once in a while but still good to drive around town. I would. Open to suggestions about best course of action. Better airflow reduces drag on the pistons and the associated pumping losses. The LFA was upgraded with AFM and [], [] improvement over AFM, DFM has 17 different cylinder firing patterns and switches seamlessly between them to provide just []. I have driven it now for 2 days without issue but I am having the AFM disabled/tuned out today. Also putting in a new transmission vs. rebuilding. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Have misfire code and engine has what I would call a surge while driving. 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. I know I felt the same way. I drive the same 320 mile trip every two weeks and drive the same route and full tank. Now im thinking of buying a disabler asap, am i in the clear to do so without the oil splashing problem? thanks brian love the info Im thinking of buying a ford now, I am going to buy a new truck in about a month it would be a Chevy but Dodge has lifter problems so they are out and Chevy has DoD problem.If they come out with Silverado without the DoD then i would buy one.But they arent so i will become a Ford man from now on, Have fun with that Ecobust motor & stretched timing chain . Weve written some articles on the various Vortec engine upgrade paths, such as this one on LQ4 and LQ9it discusses some of the better options for choosing a cam intended for use in a truck. Who knew? Everything was fine for two weeks, ow customer complains s it same noise it made as before. Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. Now I learn about the cylinder deactivation issue and suggestions to add the Range Technology module to deactivate it. Active Fuel Management About Gone From 2022 Silverado Lineup - GM Authority AFMlifters have a history of failing and oil consumption can be a problem. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. 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. Have not had a problem yet. Driver reported this occurred suddenly while driving down the highway. Just one or two. 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. The engine will operate on 8cylinders, or V8mode, during engine starting, engine idling, and medium to heavy throttle applications. Really could use some pointers. I ran 0W-20 on more the 5000 miles between changes. Fortunately, the old engine hadnt been shipped back to the remanufacturer. 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. I am hoping this does the trick. Dont drive it if you have a dead cylinder due to afm failure. My Wifes 17 Buick with afm was my attempt to get back to gm. Is Your 5.3L V8 Engine Eating Up Too Much Oil? We - GM Parts Online If under the truck while parked and it is doing it it sounds like it is towards the back of motor. 2011 Chevy Avalanche LTZ. More information can be found in the GM TSB bulletin number 10-06-01-008g. Because I want to. Why doesnt anyone make an aftermarket set of replacement AFM lifters that are the right length but DO NOT COLLPASE! Your email address will not be published. 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? If buying a tuner/chip which works best for that truck/engine? But if you dont like it. Did not help. It only has about 9k miles on it. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. I service plenty of these vehicles with AFM, and the ones I have to open up the engine for repair because of a failure doesnt surprise me anymore. All eight cylinders are now powering the engine. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. I would say maybe 5% of my customers keep up on their oil changes. Its not GMs choice to use AFM. Mine did at the exact same time. Go Small? Common Problems With the Chevy Silverado 2.7L Turbo 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. Toyota will be my next truck unless GM owns up and makes wright with consumers. have yet to find a read that shows an escalade with high oil consumption and i have read a lot on the hybrid. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. With 44, its a enormous Jon to remove the oil pan. 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. Does the disabler prevent the engine damage in the first place? There are so many moving components in an engine these days as opposed to the past. [] for performance, LS9 engines didnt use Active Fuel Management (AFM), Variable Valve Timing (VVT), or Flex Fuel (E-85) technology. GM tried this on cadillacs about 20 years ago and if memory serves me correctly it was a disaster. [] 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. GM offers the following diagnostic steps in determining if this is the problem. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. Found that all passenger side cylinders are not firing. Run it and let it soak overnight. Very confusing stuff out there. GM Releases Valve Lifter Service Update For V8 Engines But it also restricts passages that the oil runs through. It is a bad deal for sure.ive fixed a few best thing u can do is delete it in buy kit.no sense in fixing a flawed problem with the same flawed parts. Traded it with 180K miles and did not experience any problems. My dad ended up running seafoam through it and some transmission fluid, changed the oil pressure sensor which I definitely think was bad and also cleaned out the little screen and he said it was so full of junk and metal scraps. []. No other V-8 truck of similar weight can do that (except another GM with AFM). It essentially turns your V8 engine into a V4 which saves fuel. 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? Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? Cylinders two, three, and eight are all similar in cylinder deactivation. Thanks for the detailed post! 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! The lifter came apart and chewed up the lobe on the cam Im selling it I also told my friend at work when he asked me about my truck .I said Ill never by another GM ever. One the other hand, it came without AFM, VVT, or flex fuel capability. One must anticipate this. [] block engine used in GM hybrid trucks and SUVs between 2008 and 2009. 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. Took it to the dealer and was told I had a collapsed lifter. I had purchased an extended warranty when I bought the truck new. Truck has an active P0300 code and runs very rough. If the lifter actually fails so that the mechanism wont release, it wont work. They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! module (ECM) will command the cylinder deactivation system ON to deactivate engine cylinders1, 7, 6, and 4, switching to a V4mode. I was getting ~ 30 mpg, so I love that. 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. Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. I have no clue what to do now. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. If so what would the vin code be? However, they are only functional on engines that usedAFM. Having a hard time finding one .. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM I would appreciate any feedback. Shame this happened. I would appreciate it if you let me know how you make out. 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. We recently purchased an 08 Suburban and noticed some shuddering around crusing speeds, usually 45-55mph and highway speeds around 75mph. My 2013 LC9 just had #6 lifter fail, got a misfire code but the ticking gave it away. it is the regulator guy! The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. They should let us the better mileage. Don't even get me started on the shortened life of the cooling, starting and charging systems. Good point which begs the questuion, why does the Service Stabilitrak error seem to coincide with lifter failure? Where can I buy a bolt to replace this relief valve ?? For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). The early part of his automotive career included working for engine builders Scott Shafiroff and C.J. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. Will the plug in deactivater fix the oil consumption or will it cause more consumption? It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! Only thing I noticed with the oil consumption issue. Now you tell me AFM works and I will tell you; that you are full of shit! [], I have a 2012 Silverado Z71 bought new. 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). [], [] way. GM switched over to the 4100 v-8 in 1982. I quites down to nothing after running for about a minute. New plugs and wires. Remembered that after I bought my Tahoe. Was a disaster then but a profitable disaster. 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. 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. Have an intake and Borla exhaust. This is my project car and will be my drive (about 5000 miles a year). Whats the next step? Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. Cylinder deactivation works to save fuel, but it may not be for the reasons you think. One alternative is to swap in one of the larger 6.0 non-AFM truck cams. Change your oil. Learn how your comment data is processed. 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. 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. Is there any reaction to the disabler when pulling a boat or trailer? The car runs great apart from the shuddering at those speeds. The oil is baked on to every component. There are 5.3 cylinder deactivation problems that can occur. Keith, were happy to help. Love the truck. Ill Never Ever buy another gm. Thats not all bad because it saves the cost of an AFM delete kit. The motor I pulled was a 2007 LY5 with about 77k on it. There is a good chance that some of the drivers side lifters decided to go. It came back on last Wednesday starting with a flash. Is the Pressure relief valve replaceable? I have a 2014 Chevy Z51 [w/dry sump oiling etc.] It uses a M14 x 1.5 thread plug like Dorman 65217. But I can replace all of the other engine parts without doing the pistons and bearings so that is what I plan to do. I am trying to prevent same issue. Hello Brian, I just purchased a 2018 Silverado with a 5.3 AFM engine, I have 200 km on it. hi brian when you replace the lifters do you have to change the guides also? 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. 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. 2019 Chevy, GMC Trucks Get Smarter Cylinder Deactivation - Car and Driver It is usually first noticed during highway driving. The trucks are only supposed to use two four. What type of ODBII gadget did you use? It actavated the lifter? Disable Active Fuel Management - Ricks Free Auto Repair Advice Having it fixed now, just curious Seems like a problematic design. It has the orings in place, that seals the towers. If you just crack it without it starting it moves all the time . I would rather stay a V8 full time than deal with AFM issues in the future. The write up confuses me. She started to have the lifter problem again after 60,000 miles more. I did and they diagnosed it as being on Cylinder 3, not one of the cylinders that deactivates. 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. I can literally drive from Seattle to Redding CA on one tank. I am trying to find out of this is true. 1981 Cadillac V 864. I have a 2011 GMC Sierra 1500 with the 5.3. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. I only had 81k on the motor. 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. I have a shop 39 yrs . I called my service station and they told me to get it in ASAP. Stopped at nearest gas station and found I was a quart low on oiladded oil and lights eventually went off and luckily we made it the 5 hour drive home. [], [] 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.

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