How to fix AFM misfire on 5.3 Chevy

[@donniemathis2770]

This guy deserves a Nobel peace prize!

[@nv1493]

This is good info. AFM - will go down in history as one of the stupidest ideas that GM has come up with. Best thing I ever did was stick a range technologies AFM delete into the obd port on my 2011 5.3.

[@frenchfrysz6695]

Did you have any issues with that? I put one of those Range chips into my 2018 silverado, and whenever it was plugged in i would have a super harsh downshift while coming to a stop. going into 1st-2nd gear.

[@Flatlandproductionz]

Not just gm, ford & chrysler too.

[@tobydog247]

I disagree. The dumbest was the V8-6-4 Cadillac 4.1 in the early 80s

[@rikkidietz8588]

​@@frenchfrysz6695Wow. I am battling a hard downshift into 2nd as well. Dealership can not replicate it. That would makes since now since they have to remove my Range AFM plug. Very interesting.

[@charlesherber7735]

@@frenchfrysz6695 yah I had the exact same issue with my rage. My truck downshifts hard into second. Did you ever find out how to fix this

[@markbrown3644]

This was soooo helpful! I was having the EXACT same problem on the EXACT same cylinder! Mine is an 07 Avalanche so the sensor location was different but it still worked! My local garage that I've trusted for years wanted $3,000 to replace both heads and valves along with gaskets and labor. But after unplugging that sensor it ran fine and would still use the V8 and 4 cylinder modes! After a week and a half I decided to plug the sensor back in for the heck of it and it's STILL running great and getting the same mpg that I was before the problem started! Thank you sooo much again!

[@84mrgarnet]

Where was yours located? I have an 08 suburban and I can't figure out which one it is.

[@3stargarage]

sir can i unplug afm soket my gmc same problem

[@davo999]

06 Avalanche was doing this...unplugged the brake sensor and it absolutely worked....Thanks for sharing this hack!!

[@andrewgibson9520]

What brake sensor ??

[@videostar07]

@@andrewgibson9520 It literally is what this video is about, it shows you what to unplug.

[@buntnik]

Excellent! I too would take this option and top it off with a small piece of black tape over the check engine light…

[@imnickcampos]

Another simple fix is on your gear selector, switching it to M5. It will keep you in v8 mode all of the time without much compromise, the only annoying thing about it is having to do it every time you drive the vehicle.

[@dustengrier2817]

I'm literally about to get bundled up and go out in this snow and this 15 degree temperature to see if this fixes my issue. If i wanted a 4 cylinder i would have got one. Thanks man

[@geraldwillis8548]

Man it sure fixed mine I appreciate it so much save me big time and money

[@fonzrodriguez6811]

Hi. I have a 17 Silverado with a misfire in 4. Did you have any white smoking coming out of the exhaust?

[@jonduncan05]

@@fonzrodriguez6811 I got a miss in cyl6 on '09. White smoke when I crank it but not all the time.

[@Franklinveterinarycenter1of4]

@@fonzrodriguez6811 exhaust valve leak; do a cylinder leak down test at 30 PSI. Hissing noise coming from exhaust means exhaust lifter. Hissing noise coming from throttle plate means intake valve leak. Hissing noise coming from oil fill oil or dip stick tube means piston ring leak. Individual cylinder test. Be sure to get the cylinder at top dead center before starting the test. Of course a stuck open valve from carbon build up or a bad lifter causing the valve to stay open will cause this too. In the AFM engines, you have to check for both. Each cylinder has two valves, intake and exhaust.

[@lesterjones9335]

You sound like me. Its 15 degrees where I'm at now, messing around with this truck

[@jasonwirth374]

Hey man I dont ever leave comments on anything but you really helped me out. My 09 avalanche has been a beast. I thought for sure at 270k it needed a new motor when I got p0306. Watched this video and my truck is running like a champ

[@onetgarage9429]

Glad it was helpful! Thanks for the comment!

[@Stoneglasss]

Tahoe 2008 same code goons try after work

[@lopezdad30]

​@@Stoneglasssdid it work??!!

[@jamesgray6697]

Wow nice. Unfortunatly. I need to get it inspected. Or i will get harassed by you know who

[@corneliusgarrett6218]

Did it work?

[@jonathanb9429]

Tow/Haul button will also keep it full v-8, only drawback is remote start will NOT work while the check engine light is on, not a big deal though if you don't use it much.

[@m1cajah]

Does it really? I thought that only changed the shift patterns. My (very early) 2007 Tahoe doesn't have the "M" on the shifter, so, I've been looking for a way to keep it in V8 mode without buying the Range OBD thing or spending thousand$ doing an AFM delete on a 17 year old truck that's only worth $3k. I'll have to try this since I DO have a Tow/Haul button on the stalk.

[@D2O2]

Not on my 2017.

[@jonathanb9429]

@@D2O2 it should unless someone has monkeyed with the shift patterns at some point in time thru the TCM...

[@D2O2]

@@jonathanb9429 Well, it doesn't. I am the original. 189k miles on the clock. Tow 10k miles a year, definitely goes into V4 mode while tow/haul is engaged

[@jonathanb9429]

@@D2O2 good deal

[@MarcoYankn.9000]

This Should Be A Factory Recall!!!

[@donboehner6005]

Thanks for this. My Buddy is currently having this misfire problem. 👍

[@jessiehephner2497]

This is a temporary fix, these engines come with a high volume oil pump to collapse the lifters and you can disable the system with a tuner as well, but eventually when the lifters permanently collapse your engine will start to bog down randomly and oil will bleed into the intake and cylinder walls, because the afm mechanical parts are still in the engine and you will get random misfires on those certain cylinders plus the camshaft will still try to activate/deactivate those cylinders because it's still physically in the engine. I took my intake off after having oil seep into 2 of those 4 cylinders and my intake had literally 2 quarts of oil in it

[@ronclaman156]

That's why you put a sleeve under oil pressure sensor to close off oil passage to the vlom solenoids

[@bubbles14045]

​@@ronclaman156is there videos on this

[@jonathanb9429]

You may have other things amuck. DI engines are the worst about oil consumption, especially when the piston rings get gummed up & stuck in the piston grooves. clogged valve cover port or stuck EGR valve is also a common issue with oil being sucked thru the intake.

[@fasst5511]

The camshaft has nothing to do with activating the DOD. It the solonoids in the VLOM that activate it. I have disables DOD on literally hundreds of DOD equipped vehicle and have never experienced the oil in the manifold issue caused by disabling the DOD. If you are getting oil in the manifold you have other issues besides just disabling DOD.

[@MichaelShirley-nl5pe]

The camshaft has nothing to do with activating the AFM/ DOD.. tell me that you’re not a mechanic

[@jasonlewallen7146]

Unreal! Was gearing up ready to order lifters etc etc etc. 👍🏼

[@cujo7240]

I would have thought that even though you were able to disable the AFM, that the lifter would have still been stuck. Apparently, it was able to unstuck itself after you disabled AFM. I just ordered a Range module to disable my AFM, so hopefully, I'll avoid the stuck lifter problem and not have a check engine light staring me in the face. The issue I could see with having your check engine light on after your fix, is that if something else were to go wrong with the engine you wouldn't know it, since your check engine light is already on.

[@robertlipperd7352]

The 'Non-Range" brands work just the same at half the price.

[@THEPAGEBURNER1979]

Hey man I can't thank you enough I been dealing with this after replacing everything you are the man

[@sauloamador2479]

Did work ?.

[@joshleal9811]

Very helpful. Same problem just on cylinder 6. Thanks 👍

[@kslikk34]

Did you have the lifter tick and did this take the tick away?

[@detroitjohn4724]

Deleted AFM program. wire wheeled all exterior grounds. including one under dash cover. (costs nothing) started back up with 5-30 Amsoil signature /3500 max oil change. Using 5x detergent gas. Flawless performance. More pep. shifts stronger. 1.5 MPG more. But most important: no more codes on dash ! Stock except for MSD copper core plug wires. 2014 Silverado 4.3 V-6, 83K.

[@thomasbailey9820]

I have already bought all the lifters and then I found this video!!!!!

[@highlive2166]

You sir...deserve this 👑

[@r.wesleydukes2825]

Have a 2011 5.3 Silverado. I tried an AFM DISABLER, it worked sort of for a week then back to shuddering. I'm going to try this now.

[@r.wesleydukes2825]

SO FAR SO GOOD ON THE TEST. TOMORROW MORNING GOING TO WORK WILL TEST IT FOR SURE! FINGERS CROSSED.😎

[@r.wesleydukes2825]

TODAY, DRIVING TO WORK, THE TRUCK RAN SMOOTHER THAN IT EVER HAS!!

[@vaughnjohnson2492]

@@r.wesleydukes2825 What afm disabler did you use and did unplugging the brake booster connection work better than the AFM disabler?

[@user-yc1ug4fx2s]

The injectors did not fix the issue I was having. The active fuel management system is acting up at times causing the car to stutter at low RPMs. Once you accelerate, it goes away. We drive the car daily with no issues, but it does stutter/miss at times with low RPMs. Could this be a lifter problem

[@davidedgerly]

I have a question. I have a 2008 Suburban 5.3 and I want to prevent the problems that arise from the AFM & DOD. If I replace the valve cover with the new baffle and then do the tune to the ECM would that prevent the engine light from coming on? Thanks for your hard making this video...

[@DIABLO_4_Tester_Sacramento]

Do you know what could cause vibrations when engine goes to V4 mode? Lifters not stucked, afm works but i feel bad vibrations. With Range OBD device everything is ok. No fault codes, no knocking sounds. 2011 chevrolet camaro ss L99 engine

[@Franklinveterinarycenter1of4]

differential? CV joints? U joints? what did you find?

[@chrislee2874]

I've had the same issue but I just never unplug my range.. I'd like to know what causes this though

[@anthonyrodriguez-fo4lz]

A Gold Nugget, Great info. Much appreciated.

[@alanwhite173]

This works. It fixed my 2007 Silverado

[@strattonhenson8155]

I'm dropping everything and running to try this now

[@nicholasbohney3097]

07 Sierra 1500 with the 5.3 Vortec. Yesterday got the misfire on 6 along with Stabiltrack and Traction Control lights. Terribly rough shifting and tapping. Anyone have these symptoms and have luck after disabling AFM?

[@marcelovalencia8537]

I have the same vehicle and same issue swapped the spark plugs and gonna swap the spark plug wires next and gonna try disabling afm too let you know

[@phoenixledbetter8332]

Any luck

[@phoenixledbetter8332]

@@marcelovalencia8537 did it help

[@scottrobinson2286]

I had P0307, irratic idle, solid check engine light..changed coil nothing,...Service engine started blinking...Traction control also.Shut truck off,pulled the spark plug i just changed 2 years ago,it was shot ,all white....Changed it truck purred like a kitten for now....Just ordered the Range....Putting truck in M5 gear for now to keep it in v8.

[@2wheeleddemon999]

Same problem 😕

[@gggraves1]

I have a 2008 silverado 5,3 I tried unplugging the brake sensor didnt do anything mine is misfire on cylinder # 1 im pretty sure that the lifter is stuck, if that lifter is mechanically stuck will it have to be un stuck before this would work

[@onetgarage9429]

If it is stuck this may not work. If your oil pressure is low try changing the oil and taking out the filter that is under the oil pressure sensor. It might work or it might not. Good luck. Thanks for the comment.

[@FW190D9]

Same here, any luck ???

[@James-1538]

Add some marvel mystery oil. Drive around half hour and it usually will unstuck your lifter.

[@roltyd22]

@@James-1538 Yup,i used a quart transmission fluid drained oil after 5 days now its quiet no more tapping and clattering

[@ericolson1730]

Thanx man I’m going to try this out on my gxp tomorrow

[@howardzikes2197]

Wow that is way to easy, great video.

[@fulanitogonnagetu9911]

Thanks for sharing this information. You tubers I recommend you speed the video up. Southern folk do speak slow 😅. Thanks again!

[@brody6634]

Lol I typically always speed up video, but with this one has to go a full 2x 😂😂😂 id KZbin supported 2.5, I probably would have went for it lol

[@joelane5698]

But what if the lifter is already tapping will it work then

[@fonzrodriguez6811]

Hi. Did you have any smoke coming out of your exhaust when you experienced the misfire in your cylinder 4?

[@szn4kt603]

I do

[@juanj559]

I do too ...any comment of the fix you did or what it was???

[@Franklinveterinarycenter1of4]

@@juanj559 exhaust valve leak; do a cylinder leak down test at 30 PSI. Hissing noise coming from exhaust means exhaust lifter. Hissing noise coming from throttle plate means intake valve leak. Hissing noise coming from oil fill oil or dip stick tube means piston ring leak. Individual cylinder test. Be sure to get the cylinder at top dead center before starting the test. Of course a stuck open valve from carbon build up or a bad lifter causing the valve to stay open will cause this too. In the AFM engines, you have to check for both. Each cylinder has two valves, intake and exhaust.

[@itzderek8801]

If you have smoke coming out your exhaust it could be the PCV valve on the valve cover I replace it and it fix my 09 gmc sierra

[@MAD_BST]

So this may help with cars being shitty down low. i have this issue on my 2016 chevy. if you have a mechanical failure, one of the easiest solutions is to bring your car to 3000 RPM for 5-10 mins (look that part up on here i dont remember 100%) and then you should finally get the tapping noises to quiet down if not stop all together. this is again a TEMPORARY FIX UNTIL U GOT THE FUNDS TO have an afm delete kit applied, or u can do it yourself if u feel like pulling the heads to get to the cover with the rubber gromets underneath. if u chiz out the right parts on the cover afm will be disabled. u can also get kits containing small plugs for the engine which will also delete afm, as well as the cars computer ecu u can delete afm there as well. there are a ton of ways to deal with this issue. best way is to do an afm delete(kit) from texas speed, get link bar style lifters, remove the trays because they get old eventually AND FAIL TOO. Again this will trick will make your car more drivable/ if ur able to free ur lifter from the stuck position with this fix it will give temporary relief.

[@billydenham9313]

I have a 2012 Chevy Silverado 1500 5.3L. I had new catalytic converters, muffler, pipes and tips put on and now I'm noticing something I didn't notice before, an exhaust sound changes when the AFM switches from 8 to 4 cylinders. Plus, I'm seeing a push of smoke after pulling out from a stop sign or red light intermittently. I replaced both valve cover with the updated version, so I know it's not that. Well, that's 2 questions, I guess. Is the change in exhaust sound normal when the AFM switches and what could be causing the intermittent puff of smoke? I've got a 3rd question for you..... Is it normal for the AFM to be switching at low speeds, like going through town at 25mph?

[@hectorcardona488]

If you watch your inst economy even with the brake booster sensor off it will still go to 4cyl when u release the pedal. I've done tow haul mode and still drops to 4. Last resort was drive in 3rd my gear and like that is the only absolute way to not drop cylinders until you're ready to fix it delete DOD

[@onetgarage9429]

On Some newer versions this is true. What make and model do you have?

[@hectorcardona488]

@@onetgarage9429 i have the LTZ 1500 4x4

[@hrichard8651]

Thanks for posting, but I disabled the AFM on my 2013 Silverado with a box you plug into the ecm. It just started missing badly. what now?

[@adamschafer6222]

Hey I'm about to try and unplug the brake booster you described and see if it helps my 2003 tahoe 5.3 ls flex i just recently bought the car and so the problem i have with it is ill be driving and the car shuts off and ill have to put in neutral and try and start it as I'm rolling or I have to pull over and put in park and start it but it has a p0300 misfire cylinder 7

[@elliotexplores3778]

It won’t work on a 2003. That is before the dod or AfM system was put on any GM trucks. Check spark plug, coil, wire, and then injector.

[@adamschafer6222]

@@elliotexplores3778 well I did replace spark plugs and wires

[@adamschafer6222]

@@elliotexplores3778 i just ran the obd on my tahoe right now and it's showing misfire in cylinder 7 but code is p0307

[@elliotexplores3778]

@@adamschafer6222 try swapping a coil from one cylinder to another and see if the misfire moves.

[@syd122466]

Thanks I'm going to try this. I have this problem on #1.

[@stevesalisbury6865]

Thank you for the information. Mine has a misfire code for ,#4 cylinder. When I let off the gas the truck starts shaking bad but if I give it more gas it seems to smooth out ,dk what it is fir sure 😢😢

[@szn4kt603]

Would it be cheaper just to get another 5.3 I have hella codes and it’s ticking and I have white smoke coming put

[@ghantash]

I have a 2011 silverado and I got the same diagnostics about a misfire on number 4. Is the active fuel management system located in the same part of my car as the location of the car in this video?

[@duuurs]

"Range" makds a device - AFM disabler can - can be had for about $200, it will do the same thing. Plugs into the obd2 port and disables the AFM without any codes being thrown ❤

[@richardwalkey6358]

Really. Hoping this helps me got. A 07 5.3l. Tahoe. And. Just few days ago. Starting knocking. Etc. going through gas. And bad acceleration. Been trying oil stabilization and mystery oil in the gas. And. It’s helps. Some. But. Ima try this !

[@pinchebeanerricardo4520]

did it help? i also have a 07 tahoe 5.3 that is doing the same thing

[@timoman6071]

I have a 2015 4.3 liter V6 chevy silverado 1500wt, will this work? Also, my lifter is stuck and no compression on cylinder 6, do I need to pop the head and replace the lifter first?

[@MAD_BST]

replacing the lifters completely solves the problem because it addresses whats wrong and u dont need this video if you do that.

[@stevenlynch6605]

On another video a guy just replaced the map sensor right there on top of the manifold and that fix the misfire you might want to try that also.

[@TWillWin]

I tried this is my 2011 Chevy Silverado with 5.3 and it didn’t work for me. Maybe on some models ? Or for some other reason ?

[@lumberbuck9671]

Well done sir! I am looking at buying a 2006 Envoy Denali . Is their a definitive way to tell if I have DOD or AFM on the 5.3L? I have searched the net , forums & found yours on YT. (But with varying answers) Is it in the VIN#,?Or Tell by the valley plate? the owners manual does not even mention it. they say they get worst with age.If it was newer I would use your technique . But they say at the age of the SUV its not a question if its when. take care & best regards.

[@lukemus1944]

thanks, this was money saving video !

[@MeaganMayhemHolland]

So i am throwing the p9306/300 and it specifically ssys its cylinder 6 misfire. Changed the spark plugs my next go to is tbd coils and wires im reslky thinking that is the issue with the behaviir of the truck. Does this hack apply to the cylinder 6 misfire also?

[@Myaguillory-zc5kc]

Will this work on a 2014 silverador

[@mariaestrada4943]

Hi! My 2012 was giving a misfire code as well. I change the spark plugs thinking that will fix it. Now when I drive it kind of rattles or feels like it wants to stop. I don’t have an engine light on and the oils and temp are normal

[@jamesduarte1021]

Sorry if this a dumb question once the lifter is not collapsed can u just plug it bk in and work ?

[@1rotbed]

AFM needs about 27 psi to activate. I have low oil pressure (probably the oil pan relief valve is bad) and rarely makes it to 27psi on the the highway so it never activates.

[@scottk.2194]

Hey i dont have that break booster in my 08 silverado. Any other sensor this may work with that isnt a big deal?

[@rayray9777]

what did you end up doing?

[@PlymouthBarracudaV8Hemi]

can I replace lifters only on one head ? do I need to replace camshaft ?

[@fasst5511]

It depends on if the failed lifter damaged the cam lobe. If the lobe is OK and you are replacing it with another DOD lifter then you do not need to replace the cam. If you want to run standard lifters on DOD cylinders then that requires changing the cam to a non DOD cam. The one bolt cams can be replaced with the 07-13 4.8L cam. That cam will also work if your 5.3L had variable valve timing with the phaser on the cam gear.

[@BigMike246]

My 2015 Yukon Denali is currently in the shop having all the lifters replaced. I have one of those Range AFM Disabler that I'm going to use when I get my vehicle back. What is that test set? Are they expensive? I would love to look at the codes and alarms in my system.

[@pauliemoto]

You should have done the dod delete

[@cdb122980]

Would this work on the 07 Tahoe LS flex fuel

[@kensantalucia9819]

Didn’t try it yet but regardless, excellent information buddy. Thanks

[@RobbyCarlton]

Hey man o4 tahoe doesn't have that sensor and I replaced everything you did so what can I do

[@RustBucketAdventures]

I don't think 2004 had AFM/DOD.

[@timothytienter9496]

What was the oil psi before did this? Was it 0 are did it fluctuate. Thanks

[@waynepinnell4001]

did that also have stabiltrak problems

[@aaronswaim8290]

Was your misfire just random shaking at a red light? No issues under load.

[@kslikk34]

Is this prior to getting the tick or does this hack potentially work after you get the tick?

[@szn4kt603]

I got the tick I got everything 😭 I got the truck for a good deal I just have to fix it ☹️

[@fasst5511]

There are better ways to disable AFM/DOD with custom ECM programming with HP Tuners. There are also devices you plug into the ALDL plug that will disable the AFM/DOD. I prefer the custom ECM programming. And disabling AFM/DOD will not always restore a collapsed lifter. In fact I have never seen it restore a collapsed lifter with only disabling the system. I have heard of a procedure where you pull the valve cover and rocker arm and pushrod and fit a long screwdriver down the pushrod hole and whack thr top of the lifter to unstick it. But if you keep it in 8 cyl mode where the lifters never collapse to begin with there is less chance of having a DOD lifter failure. The problem with having a SES light on all the time is if you have a different code set you are apt to not know it because you think it is just on the the brake booster code. Also having a code set will disable remote start if equipped.

[@JoeLerma-uq1ee]

Does it have to run for a while in order to work , mine did not make a difference

[@MikeBox-uq8yq]

May 5th 10:00 pm do u have to clear the codes. I unplugged mine on a 2008 Silverado and it didn’t change anything. My code is misfire on cyl 7. Have to undo battery or anything like that

[@adamwhittingham86]

Range technology products have a plug in device that keeps your truck in V8 mode with no codes being thrown. $200 but works

[@onetgarage9429]

Hey! thanks for the info!

[@dgaming9791]

@@onetgarage9429 also if you put the shifter in manual and select 1 gear less than your trans (gear 5 for 6spd) it'll keep it out of DOD/AFM

[@nemesiomartin1135]

The lifters still fail eventually I use the range and mine went out

[@djokicmetamora]

I put one in a few years ago and you have to watch it, It gets bypassed and goes back to v4. Unplug and plug it back in gets it working again. Still going through oil, GM- Chevy wtf?

[@FW190D9]

@@nemesiomartin1135 Same here, mine failed inspections also, forgetting to unplug it prior to getting the inspection.

[@JamesEntrekin-tm4bv]

I have a 2009 I'm trying to figure out how exactly to unplug that sensor do you have any idea you can give me he

[@danielraymond38]

Mine still went into v4 on dash, weather it actually did or not im not sure

[@tootalldan5702]

My 2013 Sillverado did the same thing

[@chuckiedavidson719]

The only thing that sucks is in my state your vehicle won’t pass inspection with the check engine light on. There are only 2 counties in the entire state that don’t require it.

[@pauliemoto]

So plug it in before inspection and unplug again after. 🎉

[@d3adf3ar5]

Did you have to unstuck the lifter first

[@thegman4759]

My 09 avalanche is having a misfire and a good amount of white smoke when reving it i hope this works if not its okay

[@corneliusgarrett6218]

Did it work ?

[@THEPAGEBURNER1979]

Still getting that pulse feeling should I try and clear the codes after

[@franciscoochoa4705]

i have a 2010 chevy tahoe hybrid, where is this AFM sensor to disconnect it?

[@cowboy_trav2783]

Man I put a new crate motor with DOD AFM delete and I’m constantly having exhaust problems. I changed the Cats, fuel pump, coils, fuel control module. Not one single mechanic in North Houston knows how to fix it.

[@onetgarage9429]

I hate to hear that man! What is it doing? What kind of exhaust problems? Misfire?

[@clintaugustine8732]

Is it a Jasper crate engine with dod delete? Just curious because I've been thinking of buying one..... Unless this trick works for me

[@fonzrodriguez6811]

I was told I should get a Jasper delete engine as well. Anyone know if a delete with a device from Amazon could potentially fix my problem instead of getting a new engine? is there a chance that by disabling AFM, if my lifter isn't damaged, that it could solve the problem?

[@Skrewstoned]

Yo trav… any update. Im in N Houston too

[@cowboy_trav2783]

@@Skrewstoned I needed a bad as tune up! Everything good now

[@mikegray2019]

I'm going to try and unplug that booster plug and see what happens hopefully it will work I have a 2009 5.3 Chevrolet Silverado that we were replaced some of the AFM lifters but it misfired again and it has a remanufactured 5.3

[@chrisstaniland5271]

I have almost the exact same story on my 2007.5. Had it rebuilt, made it just past the first oil change and had misfires. They replaced some lifters I believe. Almost at next oil change and it just happened again. Going to try this for sure.

[@coreyjackson2028]

my 09 Silverado 5.3 doing same thing how did you fix it?

[@coreyjackson2028]

Same here how did you fix it?

[@johnnorvaisas]

I'm looking at a 2004 Buick Renier 5.3 that has a cylinder 8 misfire i hope it's just a spark plug issue

[@wadeputtbrese4049]

How did you get the stuck lifter to unstick, I had to get mine redone. To get it unstuck. And paid to have them. Delete the AFM

[@killertiller9021]

How much did it all cost? I’m looking into the same

[@jamesmichael8549]

I have a Toyota Camry 2001 2.2 Liter engine 4 Cyl . I have this kinda problem. After changing my Spark Plugs and New wires and New Coil wires .It still Misfires. Then I change my Fuel Injectors Change Oil and put some Lucas Fuel Injector cleaner Still Misfires . This is the Codes that is Showing up P0300 Random /Multiple Cylinder Misfire P0301 Cylinder 1 Misfire P0302 Cylinder 2 Misfire P0303 Cylinder 3 Misfire Is this hack going to work on my vehicle ?

[@onetgarage9429]

No, this will not work on your vehicle. Have you checked fuel pressure. Could be the fuel pump getting weak. Or a vacuum/air leak.

[@alexquezada510]

I need help man, 07 suburban 5.3, misfire at idle only and no noise or ticking, checked with a scan tool and misfire counting on cylinder 2 and 5 I already changed plugs coil and wires still persisting.

[@elliotexplores3778]

Could be an upper intake leak from the gaskets. It’s a pretty common problem. Sometimes it sets a p0101 code also or a lean code. But sometimes just the misfire at idle. You can get some carb cleaner and spray around the intake gaskets while it’s running and see if the misfire smooths out for a second, if it does then your upper intake gaskets need to be changed. It also could be an injector or your DOD lifters.

[@alexquezada510]

@@elliotexplores3778 okay I’ll start at the manifold leak test and see what happens

[@alexquezada510]

@@elliotexplores3778 so I put a long screw driver on the misfiring injectors and good injectors and they all sound with the same pulse. Sprayed the manifold on both sides and no change in idle, so most likely must be lifters or camshaft. Oh well gonna ride it till the wheels fall off then do a swap.

[@dodgers1950able]

I been dealing with traction control and engine light popping up and the truck starts shaking but I will be trying this

[@TheCustomGeek]

Did this fix your problem? I have a 2017 Yukon XL Denali with a 6.2 and cylinder 6 has left the chat. Exact same symptoms as yours. Hope this worked for you, I know this will prevent it from going to 4 cylinders in the future, but not sure how to get it “unstuck” and back in V8 mode.

[@Necromaniac24]

I have an 07 Silverado 6.0 with lifter 8 fck’d What should I do with it?

[@MariaSanchez-kv2nt]

Gracias, A'm going to try !! Gracias , Gracias !!

[@austinjohnson5028]

Would it work on a 07 Silverado 5.3 ?

[@holditonhanson1]

the oil pressure sending unit/ manifold pressure sensor /brake booster vacuum sensor / will also shut off the dod /afm according to gm's faulty causes for it to shut down if gone bad or disconnected .... the oil sensor and or brake booster can be disconnected and the vehicle will still run good and this will shut the afm /dod down by the computer ... i do the oil pressure disconnect , and it shuts dod down and runs good with check engine light on ...vehicle is a grand prix gxp 5.3 l.. ls4 with the crazy afm system on it ... what a stupid idea as far as I am concerned ...when you have a great engine design why put a time bomb afm system in it ? CRAZY !

[@PaulieUncle]

Amazing video bro....thanks

[@warrenmcfarland9569]

What if I’m having a misfire on all 4 AFM cylinders?

[@kimberlycastillo5409]

U R a genius....

[@rotsbelramos7685]

Will it work 2002 Silverado

[@MegaHowtoMan]

I used the range obs AFM delete. About $200 on Amazon

[@gregoryanderson9626]

Look into the Ranger plug and play. It will deactivate the AFM. I HAVE BEEN USING IT FOR OVER A YEAR. Works great. Plugs into the the diagnostic port.

[@hc77545]

ranger plug and play ???? where can it be look up

[@PyroHub661]

Will this work on a 2005 Chevy avalanche

[@chrishibbs]

Does unplugging that disable the ABS?

[@onetgarage9429]

On the trailblazer it does not disable the ABS.

[@davidfishferrell]

How in the world did you figure this out?

[@super20dan]

yea id like to know also

[@tonyhdj3172]

I have a 2020 Silverado 5.3 misfire cylinder three.. so I’m assuming this hack won’t work?

[@ozoneswiftak]

4 years old and already failing. Shame on gm.i would not drive it and take it to the shop. Or disable the afm.

[@robertmoore6234]

Thanks for the video. Was your vehicle smoking also?

[@kalebpyle7476]

If it’s smoking on start and it’s your pcv valve I had this problem change my valve cover cause on 04 and up models pcv is built into it

[@robertmoore6234]

@@kalebpyle7476 I changed the valve cover for that reason. It still has the p0300 code and the misfire. I think I am going to try your trick before I swap the engine.

[@fonzrodriguez6811]

Hi Robert. I have a misfire in 4 and white smoke out the exhaust. Just got the news today to get a new engine. How's your situation going? I have know idea if a delete from one of the plug in devices could engage my lifter again and fix the problem or does the smoke mean the damage has been done?

[@steveschwenke9636]

Did you also have the service stabilitak and service traction control message pop up on dashboard. Just tore mine down to replace stuck lifter in cylinder 1 that was banging bad. Ran great for three weeks, but now out of the blue I have a misfire in cylinder 4. Changed coil pack with another cylinder and spark plug wire with another and changed plugs. Still cylinder 4 misfire. So I think I'm down to a bad injector ( don't think it's that) or another collapsed lifter. Guess a compression check should verify it. Or try swapping injectors next Tried disconnecting power brake booster electrical connector but unfortunately it didn't help me Thanks for the video. It didn't help in my situation but it was worth trying

[@xponanimates9243]

Ur fuel pressure regulator and hose are bad

[@steveschwenke9636]

@@xponanimates9243 it ended up being another collapsed lifter on cylinder 4. Replaced all the lifters and got the new vlom solenoid plate. Everything fine. Definitely getting a Range afm disabler

[@ninasdad01]

Can I get a vlom plate from a non afm vehicle

[@thelikebutton8593]

Does this work on the 6.2?

[@aaronvess521]

does this work for 2011 gmc sierra?

[@3stargarage]

sir can i unplug afm soket no problem ??