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GM 5.3 AFM Plug and Play Delete
- Thread starter Trashy
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Bnorth
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I would definitely try one but only until it's time to do delete and swap in a truck norris NSR cam from Brian Tooley.
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- #3
I'm not interested in opening the motor. Would like to keep it in V8
Bnorth
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Does disabling help the lifters last longer or are they still prone to failure?
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From what I'm reading, yes it does. But would like first hand experience, from someone who's tried it.
I disabled mine through a Diablo tuner. Was more pricey but also got to tinker with engine tunes and transmission shift patterns on the weak 6L80 if you have the six speed.
I was told the disabler block for the OBD just fools the ECM to prevent V4 it’s not disabling it like a tuner. You also don’t have to leave anything in the OBD port with a tuner.
As for how it all worked, yes great definitely recommend. Had 240k on mine and engine sounded like new. Neighbours had similar mileage running with AFM and you could hear the lifters. Guessing he didn’t do oil changes as often though. I figure it only cost me about 1L/100k being in V8 mode full time. Definitely worth it. The duratracs cost me more than that lol
I was told the disabler block for the OBD just fools the ECM to prevent V4 it’s not disabling it like a tuner. You also don’t have to leave anything in the OBD port with a tuner.
As for how it all worked, yes great definitely recommend. Had 240k on mine and engine sounded like new. Neighbours had similar mileage running with AFM and you could hear the lifters. Guessing he didn’t do oil changes as often though. I figure it only cost me about 1L/100k being in V8 mode full time. Definitely worth it. The duratracs cost me more than that lol
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I should have posted that it's for a 2017 GM
gedakbx
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Keep us posted my 2020 has 75000 km no issues so far my neighbours 2017 6.2 had issues at 85000 km
MK4TDI
Active VIP Member
Range Device or get a tune.... I tuned my 2015 to be on all 8 all the time. Still had a some lifter issues but it was on the non AFM lifters. But it wasn't until till 230,000 km then it got a new cam, and all new lifters and did the mechanical afm delete.
ABMax24
Active VIP Member
I'd get a tune, and make sure the tuner changes the TCM parameters to fully lock the torque converter while also disabling AFM.
When AFM is active on GM engines, the TCM is looking for a desired Torque Converter slip of 40 rpm. Even when in V8 mode the TCM is looking for a desired TC slip of 20 rpm at low load and below about 1600 rpm. This is done to eliminate drivetrain vibrations in V4 (AFM) mode, but really isn't necessary when all 8 cylinders are firing.
Obviously this is a terrible design choice, as the TC clutch packs eventually wear out due to the constant slipping. Here is some more info, it can be tuned out with EFILive and should be able to be tuned out with HPTuners as well.
www.lsxmag.com
When AFM is active on GM engines, the TCM is looking for a desired Torque Converter slip of 40 rpm. Even when in V8 mode the TCM is looking for a desired TC slip of 20 rpm at low load and below about 1600 rpm. This is done to eliminate drivetrain vibrations in V4 (AFM) mode, but really isn't necessary when all 8 cylinders are firing.
Obviously this is a terrible design choice, as the TC clutch packs eventually wear out due to the constant slipping. Here is some more info, it can be tuned out with EFILive and should be able to be tuned out with HPTuners as well.
AFM - Fuel Saver Or False Economy
The concept of displacement on demand, or active fuel management (AFM) isn't new. But do the benefits outweigh the likely issues it causes?
www.lsxmag.com
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- #12
I installed this one yesterday. As well as a new battery, as the original 2017 battery was getting week, lol.
I go 47 kms one way to work, 4 days/week. All highway.
Last week averaging 105 kph, the truck was saying 11.2/100 with AFM active.
I will know Thursday when I get home, how this "plug & play" works in V8 only and how in affects my mileage.
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I got 1000K on now and pretty happy with it!!!
The first 4 days, I wanted to chuck it out the window..... It ate a LOT of gas an ran like sh!t, then it balanced out
Currently getting 11.3/100 and best sits at 10.5/100
Throttle response is spot on!!!!
I would recommend this product, to anyone looking at cheaply deleting their AFM
The first 4 days, I wanted to chuck it out the window..... It ate a LOT of gas an ran like sh!t, then it balanced out
Currently getting 11.3/100 and best sits at 10.5/100
Throttle response is spot on!!!!
I would recommend this product, to anyone looking at cheaply deleting their AFM
MK4TDI
Active VIP Member
That was likely your transmission relearning how to shift the way it should... unfortunately you can't tune the 8spd's
