gm cylinder deactivation problems

put tran fluid in oil for a day till lifter became active, had to change the fouled plug. When you drain the oil at three to four thousand miles its still clean. The Range AFM/DFM Disabler allows your V6 or V8 GM vehicle to run in full cylinder mode at all times, preventing the Active and Dynamic Fuel Management systems from dropping cylinders. The lifter seems to recharge whenever the truck sits for some time. On the AFM lifters that dosnt work i have installed them With the oil hole Down! Will this AFM DISABLER damage anything???. If possible, will simply not using VVT provide a powerful,good running engine? It works . Dont drive it if you have a dead cylinder due to afm failure. 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. Getting ready to diy for $450. I have an 2004 1500 Suburban 4WD that I am about to replace the motor in. Dont want to make a move on a new truck or jump to a 2500 yet. Although the last oil change I had they offered a more expensive oil that would let me go every 5,000 miles and when this happened I was almost at 4,000 so needless to say I will never do that again. Replaced all lifters. I only have ~ 5k miles on it, and it hasnt been driven hard, so Im assuming the lifters are fine. So I researched and got an AFM disabler. 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. Side note, after 200 hundred miles of trouble free driving the transmission failed so we had to replace that too. I would appreciate any feedback. I guess they also went to aluminum blocks in 2007, not sure if that has anything to do with this issues thanks for the advice! It essentially turns your V8 engine into a V4 which saves fuel. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy Most will want to get rid of the AFM immediately. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. It has AMF. We recommend taking the truck to a local chassis dyno tuner and talking with them about a reflash. 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. A problem with cylinder deactivation can be solved by tuning the intake and exhaust valves. This lowers the cost of building it [], [] aluminum block engine. Also I dont recommend doing this as you may be in violation of some emissions standard or manufacturers ethics code . Lost number four . With 44, its a enormous Jon to remove the oil pan. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. 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. im going to plug in a dissabler when im done to keep it V8 mode all the time. I guess I might have to call a dealership or GM to get a definite answer on this one. No other V-8 truck of similar weight can do that (except another GM with AFM). []. 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. We need availability of a replacement engine without the AFM. If I had wanted a 4 banger I would have bought one. A 17 with 5.3. Sometimes it will do it all the time and other times can drive it for 10 miles and then it starts but doesnt do it constantly when driving. I told her to never pull the gadget out. The biggest difference between the Vortec engines that used to be found in Chevy and GMC vehicles and the EcoTec engines found in them now are the fueling methods. My tech just installed the engine, only to notice that he doesnt have anything to plug the AFM solenoid pack into. It will show up as a misfire code in a cylinders 1,4,6, or 7. Having a hard time finding one .. 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. 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. How long did it take? Perhaps a flaw by design would be a more appropriate description . However I do have 7 year bumper to bumper warranty that covers this problem if I start to get lifter problems over the next 2 years.. On the other hand if get the AFM disabler installed I am pretty sure that I void the warranty from what I read on the policy. As it turned out one of the cam bearings was failing and causing the cam to wobble (my guess) which messed up the AFM and probably some other stuff too. I had an 82 caddy 4100 with alumn block and cast iron heads ,, Exploded in Philidelpha, Garbage.. Then changed the oil. I have no other engine problems and Id like to fix the issue. AFM sucks Im paying for a truck that has broke down twice replace the cam and lifters and now its broke down again 105000 miles never heard of that in a 350 Chevrolet. It prevents the computer from switching over to four-cylinder mode. This allows the engine to run in V8 mode. The most common issue GM vehicle owners with AFM report is increased fuel consumption. of cranking pressure because the duration is longer on those cylinders to being with to offset the AFM lifter design. I have no clue what to do now. Brian, I am leaning heavily on installing the AFM disabler. Just shut AFM off. I had one fail and it chattered the cam to the point that I had to Install a new cam. I would appreciate it if you let me know how you make out. Give the folks in Summit Racings tech department a call (330-630-0240) and they can work on a solution for you. Thanks. RANGE TECNOLOGY.COM. [], [] LS Tech: How to Delete VVT or DisableAFM []. I always have done my oil changes on time, not sure about the people who owned it before me though. The engine also had 799 or 243 casting heads which are closely related to the LS6. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. 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. Carbon Build-Up in the Intake Ports. Its ribbed with solenoids on the underside. 4,7 plugs foul runs rough at idle. 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. No clue what to do. 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. My 5.3 has a vin code of O. If thats the case, Summit Racing has dedicated truck cams that will increase power through the rangebottom to topbut the meat of it is in the mid-range where your engine spends the most time. IMHO . Call chevy.They should being paying most of that. Getting 20 mpg in town and 24-28 mpg highway and love the truck now with these mild tweaks. I may just do that Vic. NOTE:If you were in a situation where youve installed the AFM delete kit, but dont have access to a programmera disabler can still be a viable option. 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. 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. What the biggest reported problem with Chevy Silverados? The wife however found this deal on an Envoy Denali . But it also restricts passages that the oil runs through. Thanks. When you don't need the full power of the engine, it provides better fuel economy." Im a little confused on the problems too, Im reading that the 2007 pick-ups with 5.3 really had bad oil consumption and plug fouling problems, but is the 2005 5.3 that came in the trailblazers, envoys, and sabb 9-7s the exact same design as these pick-ups and prone to the same failures? Hello Keith, if your lifters are still in good shape, an AFM Disabler is a good idea. Told her that it would not last and that she needed to find a different way to get around. I speak from some experience. How is that an improvement. Driving around with a bad AFM lifter is the fastest and easiest way to destroy an engine. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. Only issue might be the oil consumption due to pressure run off and spraying of oil in crankcase? I have the towing package on my 13 Tahoe LTZ. Changing the sensor didnt help. I am worrking on a 2007 chev Silverado 6.0 engine, [] the L76 that was equipped with AFM and had a ribbed valley cover, the L98 cover was []. Required fields are marked *. stalled in a certain way a warning wouldn be a bad idea. What can I expect with the AFM in place, or, with AFM disabled (not deleted)? Are there errors or something only the dealer can clear? This may show as low oil pressure or code P0521 or P0523 and is a relatively inexpensive fix as well. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. Pulled right valve cover an rockers on syl 6 dont move. If you just crack it without it starting it moves all the time . Put everything back together proper torque, gakets, valve seals, etc. I have a Yukon 116k it now needs its 3rd set of lifters and cam. It actavated the lifter? the body is in great shape. The problem:. The computers had not evolved enough to control the sytem. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. Not sure which direction to go from here. New plugs and wires. 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. Now I know why there wa such a push to get older ,less efficient vehicles off the roads. I would rather stay a V8 full time than deal with AFM issues in the future. I just bought a 2018 Silverado. Does the Pressure relief vavle ever go bad?? 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. The VLOM consists of 4 electronically operated solenoids and is bolted to the top of the engine block beneath the intake manifold assembly.

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