gm cylinder deactivation problems

I would say maybe 5% of my customers keep up on their oil changes. 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. Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. 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. GM switched over to the 4100 v-8 in 1982. My ignition lock cylinder is completely stuck in lock position with the steering wheel locked as well. You also need the disabler installed in your obd connector. The wife however found this deal on an Envoy Denali . The 1st design (built prior to April 1, 2006) was had afm components but wasnt connected. This lowers the cost of building it [], [] aluminum block engine. Never again, except for my gen4 Z28 that has a perfect engine/trans on an otherwise rolling pc of gm crap chassis. Does anyone know how to disable the new Dynamic Fuel Management on the 2019 Silverados? RANGE TECNOLOGY.COM. []. Or not because it is the cast iron block and not he aluminum block? 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. Replace the cam or do the delete kit? Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. I went ahead and purchased a Disabler on Amazon, for preventing it happening in the future. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Just one or two. New plugs and wires. [] cherry on top is that it isnt saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. Since no air can get in or out, four cylinders provide no power. It works . 50,000 miles. I remember those Other GM vehicles that the consumer tested for GM and paid GM for the honor. It actavated the lifter? 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 just did the delete and replaced the cam as well. Install an AFM Delete Kit Shame this happened. Perform a Cylinder Deactivation (Active Fuel Management) System Compression Test. Id try the disabler and the screen cleaning first and do the AFM delete if that doesnt solve the problem. We believe this confirmed that the AFM has never been operating in this vehicle. Thanks for the detailed post! I also notice that it doesnt go into V4 when it is cold. They shift cam lobes by sliding the cam, never actually shutting down the value but riding a different lube! 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. 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. Have a lifter problem on my 2010 5.3 Silverado. Id wait until the warranty expires then disable. 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. All Cylinders. https://www.amazon.com/gp/product/B00BR1R8N8/ref=ox_sc_act_title_1?smid=A359W9MWR50ZG1&psc=1. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. 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. . [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. As GM issued 13 updatesnone of which workeddealers disabled the system on their customers' cars, leaving them permanently in V-8 mode. yep, you are 100% Right, I called a local saab shop and they filled me in, in 2005 the trailblazer and clones have DOD (displacement on demand), My next issue is getting extra ignition keys on the cheap. Yeh truck has 5237 miles on it They lasted one year with big problems. I ordered a electronic disabler for it today. Any thoughts or suggestions would be appreciated. Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. I would just have the AFM disabled (tuned out) then. Why cant u just unplug the solenoid on back of engine by oil pressure sensor? If under the truck while parked and it is doing it it sounds like it is towards the back of motor. 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 just bought a 2018 Silverado. Most will want to get rid of the AFM immediately and VVT isnt for []. The materials used in the engine were [], I have a 2018 GMC with the Eassist and AFM In October of 2010, GM added a deflector (p/n NAL-12639759) to keep oil from being sprayed directly on the rear cylinders. This is my project car and will be my drive (about 5000 miles a year). Put an S&B cold air intake on last week with huge oiled filter and it made a big improvement in throttle response and it appears possibly a slight improvement in mileage. You may eventually see a check engine light from a misfire code and the ECM dialing everything back to protect your engine. It has plenty of oil pressure and I put all new lifters in it. Thank you. She had driven it for a couple of months that way. Interesting that gm still hasnt gotten the bugs out of their Volt and now their 2nd attempt. A new class-action lawsuit has been filed against General Motors over alleged issues with its Generation IV 5.3L Vortec V8 engines. One must anticipate this. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? https://www.cargurus.com/Cars/Discussion-t30884_ds822284. I did a delete on an 07 avalanche and no have no power, any thoughts on what might be going on? Would doing the disabler option once I get it back be the right one? There are no changes in the valves or the springs. 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. Theyre also notorious for bad cam tower oil leaks. Its not possible to install them wrong? 190k on the motor always ran AMSOIL full synth since new. Did Obama make them do this? Your email address will not be published. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. It could be the filter screen under the oil sending unit. Having a hard time finding one .. The cherry on top is its not saddled with Variable Valve Timing (VVT) or Active Fuel Management (AFM) found on some Gen. 4 engines. If someone didnt want to spend gas buy a Toyota. Just recently, GM announced a temporary closure. Should I buy a Diablo AFM disabler to prevent the new block from dropping to 4 cylinder? The LH6 in 2005-06 was a little different than the one used in 2007-09, but both had AFM. 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. I have the towing package on my 13 Tahoe LTZ. The Definitive Guide to LS Engine Specs and LS Engine Upgrades, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance - OnAllCylinders, LS Engine Bore & Stroke Chart - OnAllCylinders, http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc, Range Active Fuel Management Disable Device, LS9 6.2L Engine Upgrade Guide: Expert Advice for LS9 Mods to Maximize Performance - OnAllCylinders, LMG 5.3L Engine Upgrade Guide: Expert Advice for LMG Mods to Maximize Performance - OnAllCylinders, L59 5.3L Engine Upgrade Guide: Expert Advice for L59 Mods to Maximize Performance - OnAllCylinders, L76 Car Engine Upgrade Guide: Expert Advice for L76 Car Engine Mods to Maximize Performance - OnAllCylinders, LH8 5.3L Engine Upgrade Guide: Expert Advice for L20 Engine Mods to Maximize Performance - OnAllCylinders, LH6 5.3L Engine Upgrade Guide: Expert Advice for LH6 Engine Mods to Maximize Performance - OnAllCylinders, LFA 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders, LFA 6.0L Engine Upgrade Guide: Expert Advice for LFA Engine Mods to Maximize Performance - OnAllCylinders, LZ1 6.0L Engine Upgrade Guide: Expert Advice for LZ1 Engine Mods to Maximize Performance - OnAllCylinders, What the New LT2 Mid-Engine Corvette Reveals About the Future of GM LT Engines, All the Torques: How Summit Pro LS Truck Camshafts Help Truck Owners Maximize Performance, LMF 5.3L Engine Upgrade Guide: Expert Advice for LMF Mods to Maximize Performance - OnAllCylinders, L98 6.0L Engine Upgrade Guide: Expert Advice for L98 Mods to Maximize Performance, LQ4/LQ9 Engine Upgrade Guide: Expert Advice for LQ4 & LQ9 Mods to Maximize Performance - OnAllCylinders, Range AFM Disabler Reviews | Range Technology AFM Disabler 2019, LS3 Engine Upgrade Guide: Expert Advice for LS3 Mods to Maximize Performance, LM7 5.3L Engine Upgrade Guide: Expert Advice for LM7 Mods to Maximize Performance, LS4 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L76 6.0L Car Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, L96 6.0L Engine Upgrade Guide: Expert Advice for L96 Mods to Maximize Performance, LC9 5.3L Engine Upgrade Guide: Expert Advice for LC9 Mods to Maximize Performance, LH6 5.3L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, LZ1 6.0L Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More, Chevy 4.3L Vortec Common Engine Problems - Vortec 4300 V6, https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-…, The 5 Most Common Chevy EcoTec3 5.3L Engine Problems, Chevy 6.0L Vortec Engine Problems - Common Vortec 6000 Problems, The 4 Most Common Chevy EcoTec3 6.2L Engine Problems, Gen 3 vs. Gen 4 LS Engines: How to ID Them (Video), Ask Away with Jeff Smith: Upgrades to GM LS 6.0L 4x4, LM4 5.3L Engine Upgrade Guide: Expert Advice for LM4 Mods to Maximize Performance, L33 5.3L Engine Upgrade Guide: Expert Advice for L33 Mods to Maximize Performance, Mailbag: Choosing an Engine Management System for an LS-Swapped '82 Olds Cutlass. another common cause for low OP is the oil pick up tube O ring. Told her that it would not last and that she needed to find a different way to get around. I dont plan on installing the delete kit at this time. I used 1 quart of tranny fluid in the crankcase ran it for 20 minutes, no luck. The older truck gets 19 mpg the newer truck with fuel management gets 14. also in the pan is another AFM oil filter near the external engine oil filter. if GM wont make a dependable truck for 60,000 Toyota is sure to take over even with very poor gas mileage . I drive the same 320 mile trip every two weeks and drive the same route and full tank. It's been an issue for a while but I've been getting past it by turning the key only to the off position instead of all the way back to "lock". This should be added to your earlier model if you experience oil consumption. No clue what to do. I have had some say that it is the valves and others say that it is the cats plugged. [] For more on that, read: How to Delete or Disable Active Fuel Management (AFM) on GM Engines. An AFM Disabler is an electronic device that plugs into the OBD-II port, under the dashboard. 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 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. 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. I am hoping this does the trick. Perhaps a flaw by design would be a more appropriate description . Hi. Now the problems back, I have 180k miles on it now. 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. Your email address will not be published. Once the lifter has been damaged, the cam is probably also damaged. No problems with any to this point. I have a 12 wit 4.8 Silverado 75000 miles Brian, I just purchased and installed a remanufactured L76 AFM engine for my 2007 Suburban. 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. I quites down to nothing after running for about a minute. Chevrolet 5.3 Engine Issues and Recommendations This system is the most effective way to disable AFM. CHANGE YOUR OIL!!!!! He unstuck it and I took it for a drive and same thing happened. Learn how your comment data is processed. The engine will operate on 8 cylinders in V8 mode during starting, idling, and medium or heavy throttle conditions. any help? Now i have my mechanic trying to follow a YouTube video I saw with a guy and a rod and a hammer. Our patented technology is the only product that will disable Active or Dynamic Fuel Management without reprogramming the factory ECU. [] they have a downside? I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. Thanks to a properly maintained 5.3 with AFM, I can routinely get over 20 MPG on the highway. I want to put a AFM disabler in it what all do I need to have done. It has has 9000 miles and no lifter or other issues or codes so far. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. This reduces expense when you build it [], [] intake, and a cable-driven throttle body, plus Im also installing Trick Flows VVT and AFM delete kits. The pressure relief in the pan opens at around 45psi to prevent over pressurization of the vlom solenoids. Dont drive it if you have a dead cylinder due to afm failure. is it still working good since you have done that with the trans fluid? If I put my truck in manual 5, it doesnt try to go into V4 mode. There are 5.3 cylinder deactivation problems that can occur. Its a simple and effective way to turn off the AFM system and provides the added bonus of improving exhaust sound. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. Once the failure has occurred, the AFM shut off methods other than that probably wont work. 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. Teflon coatings does not last. I hate it. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. The engine has flex-fuel capability. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. I didnt even think about AFM until I got to drivee it on the highway and encountered the 4 cyl syndrome. Look for the following: TheAFMcover is called the Lifter Oil Manifold Assembly (LOMA). . stalled in a certain way a warning wouldn be a bad idea. . This will spray oil on the bottom of the cylinder walls which can cause oil burning, especially in high-rpm engines. 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? 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 I had been able to push the issue and get the time, I would have done the full fix at first without the hassle. Please report back if you have any issues, but I think you are in good shape. Do not pay that amount. I was getting ~ 30 mpg, so I love that. It came back on last Wednesday starting with a flash. 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. im going to plug in a dissabler when im done to keep it V8 mode all the time. I couldnt agree with you less, yet I respect your opinions. Plus the 5.7 has its own problems with VVT reliability and the rest of the truck is flimsy junk. Vehicle has 40k miles been maintained well and shows no signs of lifter concerns at present. Thanks for the advice Brian! Welcome to socialism folks . Its job is to direct the flow of pressurized engine oil to the active fuel management intake and exhaust valve . IMHO . Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. This basically deactivates the cylinder deactivation system. After all we bailed them out of bankruptcy. what deleter (if thats a real word) have you heard good things about. This is my second Avalanche and I never had any issues with either of them. 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. The engine is close siblings with the LMG which shared many of the same featuresexcept the LMF isnt saddled with AFM. There has been a lifter noise since I bought the truck 1 year ago. A lot more info with the ongoing GM 5.3l AFM engine issues on Cargurus. Pulled right valve cover an rockers on syl 6 dont move. A lot of drivers reported losing 2-4 quarts of oil in between oil changes. Thanks. When we removed the oil pan from the new block, we noticed a metal shield covering the bottom of the block. Todays computers are faster so it does work. A 17 with 5.3. The biggest problem is nobody changes their oil on time. Im crossing my fingers it does the trick! 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. 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. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . I have a 2012 Chevy Avalanche. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. After a stint in the U.S. Air Force, Brian Nutter studied at the Houston, TX-based School of Automotive Machinists in 1997. Toyota has their own problems. AFM works by deactivating half of the engines cylinders under certain circumstances to reduce fuel usage. In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Double digit MPGs in my 98 K1500 would be a dream lmao. 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. I havent has any lifter or cam issues. They are being forced by the feds to use stuff like AFM to meet the CAFE requirements. I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. Anyway, after some pushing and pulling I took it to the Dealer who sold it to me. Not sure what else it can be. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. Im always sorry to hear when people run into issues like these. Put everything back together proper torque, gakets, valve seals, etc. 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? []. AFM Sucks!!! It has the orings in place, that seals the towers. I cant really tell from driving. Battery was unplugged for a week.. At least Dodge admitted they had junk transmissions in the early 2000s and picked up sales each. 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??? Most of all, my concern is reliability. The lifter seems to recharge whenever the truck sits for some time. The valve itself is part number W0133-2574213. Still have no power. I have a noise in the engine but it seems to go away when revved up. Ketil, let us know what you find out. I called my service station and they told me to get it in ASAP. 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. There is a chance the cam lobe was stressed and started to deteriorate. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). Would you get enough power to drive at freeway speeds? Here are a few of the issues that you'll want to keep on your radar if you drive a 2017 Chevy or GMC vehicle with a 5.3L engine in it. Another option is to plug it entirely if the AFM is already removed. Yes, always change all the lifters at once. The dealer in Rockhill, SC when asked only said they had not had a problem. These engines made 270-400 hp from the factory will run smooth as silk for over 300,000 miles (unless you have AFM). Who knew? Most of the complaints show up in the 2009 to 2011 model years. 2011 Chevy Avalanche LTZ. Thats not all bad because it saves the cost of an AFM delete kit. Im considering just replacing the 5.3 ( should be LMG, 2007 YUKON ) with the L96 crate engine. I told her to never pull the gadget out. Whats the next step? .or something similar . It also mentions a valve cover replacement with revised PCV valve design. Sylinder one lost compression on my 09 5,3. I guess I might have to call a dealership or GM to get a definite answer on this one. Where can I buy a bolt to replace this relief valve ?? Unplugged AFM engine only runs on 4 cylinders #2,3,5 and 8. [], I have a 2012 Silverado Z71 bought new. The L76 is an adapted version of the LS2, featuring new rectangle port cylinder heads and Active Fuel Management (AFM). whith a disabler.

Island Hunters Fiji Yasawa, Cranston Ri Obituaries Past 30 Days, Anita Groowe Before Surgery, Articles G