gm cylinder deactivation problems

September 2017, I got talked into trading for 2017 AFM this was a bad choice 5.3 engine. Ketil, let us know what you find out. AFMengines use special lifters for cylinders 1, 4, 6, and 7. Dont follow just anybody I know where it originates but in todays world I found found it to be amusingly accurate. Would you get enough power to drive at freeway speeds? Vortec 5300s featuring LH6 and LC9 engines are prone to failing spark plugs due to carbon build-up. She started to have the lifter problem again after 60,000 miles more. I got a 09 Chevy Ive had the 1 go out then the 7 about 2 weeks apart if I known what I know now I wouldve changed them all at once but now I have a misfire on cyl 4 but it came back in why are these lifters going out one at a time like this the 1st two that went out I was coming off the interstate an stabiltrack came on now the 4 misfired twice both times pullling out my driveway. GM Active Fuel Management Cylinder Deactivation Technology - GM Authority Not sure what else it can be. Your email address will not be published. If someone didnt want to spend gas buy a Toyota. In four-cylinder mode, they act like air springs and allow for smooth operation. Because I want to. So now at 168 thousand miles it still runs good but gets bad gass mileage. It also has an electrical connector on the back. 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? It has plenty of oil pressure and I put all new lifters in it. Clean oil is crucial. Hopefully more is known by then. But not sure very annoying. The LZ1 was upgraded with AFM and []. Get this, rebuild is only rings and maybe lifters. Both #6 lifters only move when turning engine by hand, if you use the starter they stop moving. That inherently less smooth operation requires additional NVH dampening. 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? If doing that, the full blown AFM delete is about $1000 depending on how far you go (full overhaul or cam with lifters only). Now you tell me AFM works and I will tell you; that you are full of shit! , Production date on the vehicle is 04/2006 oddly enough. The collapsed lifters will not engage the pushrods and both valves remain closed. Solenoids, new lifters also test voltage to solenoid pack all good their, I have no other engine problems and Id like to fix the issue. Toyota has their own problems. Brian, I have been reading your article about the AFM. I went with the new motor for the warranty. A tuner can often fix that as well by giving it some more ignition advance in these regions. Loved the looks and interior and thought a I got a great deal at $6k even. Have an 06 Yukon with 5.3, original engine had bad knock, was told it was lifters so had them replaced. General Motors Active Fuel Management Cylinder Deactivation Technology Active Fuel Management (AFM), otherwise known as Cylinder Deactivation is a General Motors engine technology that. My 2012 Silverado 5.3L just did the same thing as your Tahoe Brian. in your opinion will this work, i really dont see any reason it wouldnt. [] For more on that, read:How to Delete or Disable Active Fuel Management (AFM) on GM Engines. I have been assuming this is just a slow to pump-up lifter or lifters. The result is improved combustion chamber pressure as the piston approaches top . Replacing engine due to issues caused by AFM. I have 4 GMCs in my driveway right now only one with AFM its always popping DTCs, 06 Yukon (not AFM)never had a light in 12 years! Since the tranny oil worked, you should now change the oil, right? any help? I have a noise in the engine but it seems to go away when revved up. i just bought a 2018 Silverado with the 5.3 When you drain the oil at three to four thousand miles its still clean. WATCH THIS VIDEO https://youtu.be/1MJMf3nnQhQ. Hi Brian please help, yesterday after ice fishing was climbing a hill back home and check engine light flashed. Jusy 3 weeks ago I quit driving it because of the lifter, but it worked fine when i started it back up. You also need the disabler installed in your obd connector. 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. Afaik the 6.0 escalade hybrid does have it so wondering if safe to delete. My 97 k2500 suburban with a lightly modified 6.5L diesel gets 20ish. The AFM activation and deactivation is controlled by the Valve Lifter Oil Manifold or VLOM. Next day, fired it up to take the the junk yard and it ran great. 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. Dont drive it if you have a dead cylinder due to afm failure. Told her that it would not last and that she needed to find a different way to get around. Do you think it would be wise to put a AFM disabler on a brand new truck to avoid engine damage? . Put everything back together proper torque, gakets, valve seals, etc. In other words, the crankshaft and bearings were not visible. 190k on the motor always ran AMSOIL full synth since new. Engine starts but is throwing a misfire on cyls 4,7. Power will be sent to the rear axle via a beefed-up 4L60E [], Have a problem with 09 Chevy 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. Im servicing a 2011 Chevrolet 5.3 with AFM. Thank you again for the response. I have had some say that it is the valves and others say that it is the cats plugged. Engines withAFMalso use a special camshaft, a high-volume oil pump, and a pressure relief valve in the oil pan. Now it appears GM and their handlers want to push the electric market with throw away junk that is mechanically weak . Please report back if you have any issues, but I think you are in good shape. My question on a 2007 Chevy Tahoe 5.3 AFM 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. The Hit and Miss Nature of Cylinder Deactivation Systems It replaces the AFM components with standard parts. 2017 5.3 Liter Chevy Engine Problems: Be Aware of These 4 Issues! Then again, it should have never been controlling those solenoids. I have 217,000+ on it and it never fails meever! I was looking at the 08 escalade hybrid with dod on its 6.0 so wondering if the delete would contribute to the high oil consumption and therefore would adding the deflector be a good idea. The cylinders are deactivated by means of a double-stroke lifter which is FAR more prone to failure than a standard lifter. Also, it is the easiest way [], [] for the 2010 Chevy Camaro SSis also a Gen IV 6.2L aluminum-block V8, but with the addition of Active Fuel Management and Variable Valve Timing. When you eliminate the AFM system, the extra oil is no longer needed. .That was a year ago and now I have a collapsed lifter and the most inexpensive repair $2200.00 for a partial lifter replacement. However, they are only functional on engines that usedAFM. Really could use some pointers. 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. How did your turn out? Install the AFM disabler now or wait until my warranty just about to expire to get this AFM issue resolved? Just like Ram and their trash MDS system or Ford and their throwaway Ecobust engines. Troubles begin with Bean-counters decide on what can be used for production and engineers who arent Gear-Heads. It looks as if Ill need to start saving for a complete AFM delete kit with a new cam. If you scroll back, you will find that it is recommended to change lifters and camshaft and looks some more. There is no way cylinder deactivation and the resulting temperate decrease, with sudden piston heat expansion when all cylinders are engaged, can't have undo wear and tear on the rings, valves, piston and bore. If i am successful locating a non-dod vin would i just need to have the ecm reprogrammed? Help appreciated. Hi Mike, the metal shield you noticed is probably the windage tray. Is Your 5.3L V8 Engine Eating Up Too Much Oil? We - GM Parts Online I have a 12 with 4.8 Silverado 75000 miles The most common are fuel pump failure, transfer case sensor failure, fuel injector failure, and carbon build-up. But if you dont like it. http://www.autoserviceprofessional.com/article/91652/ticking-gm-v8-lifters-and-dtc. Your email address will not be published. Traded it with 180K miles and did not experience any problems. I got as high as 23mpg on the highway in my 89 K1500 with 350ci and a five speed manual. Is this an issue only with GM SUVs and trucks, or does it include cars too? 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. Yes a poor design but a flaw ? 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. Wed recommend a call to our partners at Summit Racing. Covers me to 100K. I can literally drive from Seattle to Redding CA on one tank. Cylinder deactivation | GM Truck Club Forum Not sure which direction to go from here. My question is: do I install the electronic disabler on the new engine to avoid future issues? 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). The Jury is still out on the Gen. 5s but the warranty could be an issue. But yes ultimately, it might be time for a cam and any AFM lifters that werent replaced. If I were to put a 2006 5.3L in a 2007 Avalanche and buy the unit to plug into my OBD2 port would it work? Would really appreciate your comments on this point as really interested in an 07/08 escalade without or an 09 hybrid with dod. I have a 2014 Silverado with a 5-3. Once the lifter has been damaged, the cam is probably also damaged. The secondary pressure relief in the back of the pan began to open at 55 psi and was completely open by 75 psi. GM Releases Valve Lifter Service Update For V8 Engines Thanks. We chickened out though and just bolted the AFM solenoid plate onto the used engine. I dont know where to being to look for the problem. [], [] 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. Whats the next step? Was a disaster then but a profitable disaster. For a primer [], [] cathedral port cylinder heads and used Active Fuel Management (AFM). Hi Brian, Most will want to get rid of the AFM immediately. Would it be fine to go ahead with the AFM Disabler? Will the plug in cause my truck to burn more oil or will it fix the oil consumption issue? Toyotas 5.7 is one of the biggest gas guzzlers among half-ton trucks. It has 8,000 miles on it. (Bought car 1 day before lifter died!) Its Chrysler and Ford. They took the engine down today found so much damage inside they ordered a new engine from Detroit. If I put my truck in manual 5, it doesnt try to go into V4 mode. I was getting ~ 30 mpg, so I love that. My 5.3 has a vin code of O. I am confused about the plug in disabler. We did take it apart to check for metal possibly being trapped inside, it looked like brand new. I just bought a 2015 5 3 17000 miles I was thinking about eliminating the 4-cylinder if I delete it with just the programmer will it hurt my motor? But it also restricts passages that the oil runs through. I would just have the AFM disabled (tuned out) then. Would installing the Disabler solve this? I have a 08 6.0L out of a Silverado with an aftermarket oil pan that has no provision for a pressure relief valve. I only had 81k on the motor. Its a CA EMMISIONS TRUCK. All I can say is they now try this again and they are still having trouble..when will they ever leave well enough alone. 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. Hello. 330-630-0240. 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 []. Took it to my dads and he tore things apart and found that I had a lifter that was stuck. Its got a hundred forty-five thousand miles on it. AFM - active fuel management strategy which deactivates the lifters on specific . Better airflow reduces drag on the pistons and the associated pumping losses. I ran 0W-20 on more the 5000 miles between changes. Problems After AFM Delete And How to Solve Them? - Tools Bible Having it fixed now, just curious Seems like a problematic design. 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. Driver reported this occurred suddenly while driving down the highway. I did noticed the oil consumption but it was rare that I would have to add oil. Oh,the throw away vehicle has 77,000 miles and has always had meticulous maintenance . How to Fix GM's Cylinder Deactivation Problems . 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. The most common issue GM vehicle owners with AFM report is increased fuel consumption. Dale, I have a 08 Tahoe thats doing the same thing.Any info you have on this would be appreciated, [] Do they have a downside? This update also saw the usage of cylinder deactivation technology or Active Fuel Management. Never did strand me on the side of the road way. Vehicle has been serviced more regular than the manual calls for and the AFM has caused problem after problem with fouled plugs. All eight cylinders are now powering the engine. It essentially turns your V8 engine into a V4 which saves fuel. Per bulletin 10-06-01-0007b, 2007 L92 had first and 2nd design. NOTE: Some parts are not legal for use in California or other states with similar laws/regulations. GM switched over to the 4100 v-8 in 1982. Had nothing but trouble out of it. You can search our site by engine code to find some of the upgrade articles weve published and more are on the way. Cylinder deactivation is very effective in reducing fuel and reducing the emissions of harmful gases. 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. Im praying that my RangeTech buys me a few years. . Below youll see references to the L99 as a result. I ave noticed the point about excess oil spray. If buying a tuner/chip which works best for that truck/engine? It works . RANGE TECNOLOGY.COM. The Oil pressure relief valve deflector added in Oct. of 2010 is small and its part number is NAL-12639759. I have read synthetic isnt good for AFM lifters. [] For more information on AFM, including a comprehensive guide on how to completely remove it from your engine, check out this article. You will get codes thrown if the afm is physically removed without telling the ECM you did so. The service manager that I spoke with said, GM states if 2 qts of oil is used between oil changes the engine needs rebuild. Thankfull for any ideeas! A 17 with 5.3. Remembered that after I bought my Tahoe. Brian, I repaired a 2012 GMC Yukon Denali as the AFM lifter on #4 I take failed. Yes thats true. Install ls3 valley cover. 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???

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