How about if they just let us have a manual transmission agains for fuel mileage? Very confusing stuff out there. AFMengines use special lifters for cylinders 1, 4, 6, and 7. (Non-AFM engines have a smooth cover.). Would doing the disabler option once I get it back be the right one? in your opinion will this work, i really dont see any reason it wouldnt. They took the engine down today found so much damage inside they ordered a new engine from Detroit. Are there errors or something only the dealer can clear? I only had 81k on the motor. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. Oil 0w or 5w -20 [], [] Its a Gen. 4 5.3L iron-block engine, so youre getting the better intake manifold, connecting rods, and ECM. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Engines with AFM use a high-volume oil pump. 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. Thank you again for the response. They layed over night in engine oil before instalation. Will the plug in deactivater fix the oil consumption or will it cause more consumption? Since no air can get in or out, four cylinders provide no power. . Thanks for the detailed post! Hi Mike, the metal shield you noticed is probably the windage tray. Everything was fine for two weeks, ow customer complains s it same noise it made as before. 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. Told her that it would not last and that she needed to find a different way to get around. 2 15 with 5.3 Sierras both with 100k and In 5th gear on deceleration and 99 for fuel mileage estimate on the dash it still didnt go into 4 cyl mode. Now I get 24 to 26 with deactivation locked out and full power. I have a 2012 Chevy Avalanche. I pulled the head off, replaced the lifter and put the gadget in the ODBII for about $400 total. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. Got rid of the bobblehead Rancho offroad shocks immediately and replaced with Bilstein coil overs. 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. Still have no power. Service manager said nothing else needs to be replaced because the engine has a Teflon coating. This is my project car and will be my drive (about 5000 miles a year). 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. I have a 2011 GMC with over 162,000 miles on it and it runs great! Is there any reaction to the disabler when pulling a boat or trailer? Thanks. 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. Brian, I have a 2010 burb with the exact same symptoms and questions as Shawn please help! It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. Jasper makes aGM engine that deletes AFM & will warranty the engine to a 100,000 miles parts & labor . It has AMF. 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? 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. Did Obama make them do this? Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. I bought a 2010 GMC Sierra 5.3L Truck in 2013 with 24K miles. It is also known as Displacement on Demand (DoD) or cylinder deactivation. So now at 168 thousand miles it still runs good but gets bad gass mileage. 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? Just shut AFM off. Have a lifter problem on my 2010 5.3 Silverado. When you eliminate the AFM system, the extra oil is no longer needed. [] engines is that when VVT (variable valve timing) appeared and was later followed by AFM (which is Active Fuel Management, when the engine deletes four cylinders under light load) both of these packages drastically affect []. Should I wait until the warranty runs out, or will that be too late to stop possible damage? The detergent. My local mechanic suggested whatever I buy with an AFM he will send off the ECU to have the AFM flashed out. Many people find the four-cylinder sound annoying if their vehicle is equipped with a louder aftermarket exhaust. Keith, sometimes they will only replace one lifter rather than the whole setIf thats the case, another lifter can fail again pretty quickly. what deleter (if thats a real word) have you heard good things about. 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 . I just bought a 2018 Silverado. We have purchased a used low mileage 6.2L as that is all the extended warranty company would pay for. It will show up as a misfire code in a cylinders 1,4,6, or 7. The engine will normally operate on 8 cylinders in V8 mode during starting, idling, and medium or . I have read synthetic isnt good for AFM lifters. As long as a lifter hasnt started to fail, you can get by with a less-expensive disabler as preventative maintenance. They lasted one year with big problems. According to CarComplaints.com, several drivers have had excessive oil consumption issues for a while from 2007 to 2011. There may be an ignition related issue on that cylinder. It was well researched and tested back in the late seventies and eighties . I dont plan on installing the delete kit at this time. Its not GMs choice to use AFM. 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. 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. It only has about 9k miles on it. If you left the original cam in, the AFM cylinders will be down about 25 lbs. Replaced all lifters on passenger side as well as pushrods for even wear. I have a 2013 1500 with the LC9. When a deactivated cylinder is reactivated, the control system opens the exhaust valve first to evacuate the trapped exhaust gas, before reactivating the intake valve to allow reactivated cylinders to revert to the normal operation of the compression/combustion exhaust/intake cycle. I have a 2014 Chevy Z51 [w/dry sump oiling etc.] I got the AMF disabler anyway and so far so good. My 2013 GMC Yukon XL 6.2L is currently having a failed lifer replaced. What makes you think it was a design flaw ? Number 7 cylinder lifters stops moving when truck starts. I am wondering the same thing. Change your oil. GM get a clue! So I did the job one more time. Getting ready to diy for $450. Any truth to that? My 5.3 has a vin code of O. 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. I called my service station and they told me to get it in ASAP. Call chevy.They should being paying most of that. Your email address will not be published. Thanks. I couldnt agree with you less, yet I respect your opinions. []. 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. Thank you. So bad theyve been rated least reliable midsized truck by consumer reports for 3 years in a row. Replacing engine due to issues caused by AFM. They should let us the better mileage. 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. I bought a 2022 GMC Sierra 1500 with 5.3L, X31 off road package a year ago. 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. 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. 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. Having a hard time finding one .. 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. If you want to delete it entirely, its a M14 x 1.5 pipe plug or you could use the Improved Racing plug p/n IRP-814-M14-Kit. How did your turn out? I have a 2014 Silverado with a 5-3. how many miles do you have on your engine? I have an 07 Silverado 1500 ltz. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. Brian, I switched from gm to dodge in 1984, have had 3 1st gen Durango and 4 2nd gen Dakotas, all used, with impeccable reliability. 190k on the motor always ran AMSOIL full synth since new. 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. My Chevy truck with fuel management can not touch my 2000 Chevy with out fuel management. As we were installing the sensors prior to installation in the vehicle, we noticed that there was no fitting on the oil pan for the oil level sensor. If someone didnt want to spend gas buy a Toyota. It was the first Gen. IV LS truck engine and offered Active Fuel Management (AFM). Had nothing but trouble out of it. 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? Brian, I have been reading your article about the AFM. Covers me to 100K. You also need the disabler installed in your obd connector. I have an 08 Suburban that is currently getting the lifters replaced a second time within a three month span. More information can be found in the GM TSB bulletin number 10-06-01-008g. I recently bought a low mileage 2013 Silverado and the lifters collapsed. Question I have a 2015 Silverado and had a transmission go bad when I had it rebuilt I had the AFM/DOD turned off. All eight cylinders are now powering the engine. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. 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. This happened on a camping trip with my kids last friday night. I also notice that it doesnt go into V4 when it is cold. GM should recall every vehicle with this terrible design flaw! 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. 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. Will this AFM DISABLER damage anything???. 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. It essentially turns your V8 engine into a V4 which saves fuel. The oil collapses the plunger inside the lifter. Why have you not gotten a reply from Mr Nutter, Buying a Silverado 6.2L. The engine also had 799 or 243 casting heads which are closely related to the LS6. AFM - active fuel management strategy which deactivates the lifters on specific . Oil consumption problems can be caused by a number of factors, including low oil pressure, worn oil seals, or worn engine parts. IMHO . I am trying to prevent same issue. AFMlifters have a history of failing and oil consumption can be a problem. bought at Brian Tooley Racing ! My 2002 I had over 298K on it with no engine related issues. Would you get enough power to drive at freeway speeds? In 2015, I purchased a new Tahoe with the AFM and two weeks ago with 71K miles on it, the engine light came on. it is the regulator guy! The cost of just rings $4,000.00, [] Disable your Chevy AFM: https://www.onallcylinders.com/2017/11/30/how-to-delete-or-disable-active-fuel-management-afm-on-gm-… [], [] like front timing cover, knock sensor location, cylinder head style (cathedral ports), AFM (Active Fuel Management), and other components are key clues to which engine family youre looking []. Lost number four This new lawsuit is essentially identical to the previous. The only problem is the extra spray on the cylinder models if a deflector isnt used and this can show up as increased oil consumption. The engine will switch to operating on fewer cylinders when cruising at a constant speed. There are two ways to disable or delete Active Fuel Management on your GM or Chevy Gen IV LS or LS-based Vortec engineone is to install an AFM Disabler, and the second is to install an AFM Delete Kit. I just got a 2013 Silverado extended cab 4X4 with 124,000 miles on it. Thankfull for any ideeas! I have an 07 Yukon with over 180K. [] 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. Replaced the engine with remanufactured one and had the AFM turned off with a computer hooked to the ECU. We had one for a company car in 82 and it never did run right from new but at least it didnt destroy itself.
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