How to DoD AFM delete or disable.

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10-19-2022
SiriusC1024

2 Attachment(s)

How to DoD AFM delete or disable.

Deleting Displacement on Demand/Active Fuel Management doesn't necessarily require a delete kit has to be installed. If your lifters haven't collapsed yet then they will hold up perfectly fine after removing DoD in the tune.

If you are installing a kit because of collapsed lifters then you will have to tune this way anyway.

Disabling DoD will save you money by preventing the common problem of eventual lifter collapse. The transmission life will be extended as well because there will be less shifting and hunting for gears.

Don't waste money on OBD adapters that fool the sensors and may cause dangerous driving conditions (speed sensitive steering). No need to unplug the brake booster sensor. Finally, don't be fooled by remote tune scams. Tuning DoD out is very easy to do with HPTuners.

Procedure:

Engine -> Fuel -> Lean/Fuel-Saving -> DOD dropdown menu
Set to Disable.

Engine Diag
Find DTC's related to cylinder deactivation. Found in P3400 and on. Uncheck SES Enable and set to No Error Reported.

--- Below edited per discussion:
(Optional) Engine -> Airflow -> Variable Camshaft -> Desired Angle
Set VVT angles uniformly per column from 1000 to 3400rpm. This area is the light throttle/cruising area. Many of the positives of DoD delete, as far as throttle feel and torque, will be increased even more so.
--- End edit

(Optional) Engine -> Airflow -> Variable Camshaft -> Intake Camshaft/Exhaust Camshaft
Set intake and exhaust minimums to 0 to allow for better torque.

Attached are stock and modified tunes with all changes mentioned applied as a comparison.
10-19-2022
Tfoggy

Just to add: the cam angle settings is for VVT - not DOD
You can get rid of DOD and keep VVT .. it helps with fuel mileage
Once you disable the DOD in the tune, that's all you really need to do.. IF you are still using your DOD cam & lifters: just know
that disabling them (while they are functioning correctly) will buy you time... BUT they will still eventually wear.
10-20-2022
SiriusC1024

Please understand. The cam angles have to be zeroed out in the regime where DoD used to operate. That extreme cam advance is for 4 cyl mode. Since the engine will now remain in 8 cyl mode in that envelope, the cam has to be adjusted for that. Otherwise, you will get codes for random misfire.

VVT still scales at the upper rpm range. Those angles are correct.
10-20-2022
Shrek

Quote:

Originally Posted by SiriusC1024

Please understand. The cam angles have to be zeroed out in the regime where DoD used to operate. That extreme cam advance is for 4 cyl mode. Since the engine will now remain in 8 cyl mode in that envelope, the cam has to be adjusted for that. Otherwise, you will get codes for random misfire.

VVT still scales at the upper rpm range. Those angles are correct.

This is not correct. The VVT camshaft angle tables do not need to be adjusted, when simply disabling / removing AFM operation.

If you look GM calibrations for similar engine platforms (e.g. 2009 6.2L L9H without AFM versus 2012 6.2L L94 with AFM) - the camshaft angle tables are similarly populated in both calibrations.

Over the past decade, I have personally turned off the AFM function within the calibration, on a large number of GM truck applications. There was never any issue with misfires being reported afterward.

If the engine remains in 8 cylinder mode, then it will only use the corresponding 8 cylinder mode portions of the overall calibration.
10-20-2022
blindsquirrel

lol

(sorry)
10-20-2022
village_idiot

This post started off bad, and then went worse...finally got better with Shrek thank god.

Literally just Engine > Fuel > Lean/Fuel Saving.... Top left toggle the DOD "enable" button to "disable"

If you want to go the extra mile, and delete the corresponding DTC's (I only do when we perform a mechanical delete), then go Engine > DTC's and delete the Cylinder Deactivation DTC's (P3400 to P3457 ish)
10-20-2022
SiriusC1024

Quote:

Originally Posted by Shrek

This is not correct. The VVT camshaft angle tables do not need to be adjusted, when simply disabling / removing AFM operation.

If you look GM calibrations for similar engine platforms (e.g. 2009 6.2L L9H without AFM versus 2012 6.2L L94 with AFM) - the camshaft angle tables are similarly populated in both calibrations.

Over the past decade, I have personally turned off the AFM function within the calibration, on a large number of GM truck applications. There was never any issue with misfires being reported afterward.

If the engine remains in 8 cylinder mode, then it will only use the corresponding 8 cylinder mode portions of the overall calibration.

Alright, then I stand corrected.

On this particular vehicle it had to be done. Sorry for the confusion.
11-01-2022
BPella

I have a 2019 Silverado LD Gen5, 6L80, with direct injection. I added cold air intake and am now getting ready to HPTuner remove DOD. Eventually, within 2 years I will do headers, cam, lifters and physically remove the DOD. For now, having read what is above in this thread, do I need to mess with the VVT? I will kill the DCT's (P3400 to P3457 ish) I will repost the actuals when I look at my tune file. I hate when V4 kicks in and runs rough which drives me crazy. Secondly, is there any Trans changes needed after DOD? Thanks! I am familiar with the old (2000 silverado) pcm but there it appears the newer pcm's have many more capabilities.
11-02-2022
SiriusC1024

No. You don't have to mess with VVT. Shrek pointed out that factory tunes without DOD have similar VVT schemes.

It's an optional thing. I'll edit that in to my original post.

If you are towing or want more torque then yes it'll help. Focus on the area in the comparison files posted. This is the light throttle/cruising envelope. MPG will likely suffer, though.

Doesn't hurt to experiment. Personally, I like the extra torque even for daily driving.

No trans changes are needed.
11-02-2022
village_idiot

No trans changes are required, but I'm an overthinker, and I like to go to...

Transmission > Torque Converter > General > "Use DOD Slip", and set that to disable
11-05-2022
BPella

Thank you
12-06-2022
Xguardian

Thank you !
Just had to rebuild my 09 LH6 5.3 Silverado 4x4. dropped in a Truck Norris Cam and deleted DOD . Keep getting passed around trying to get tune so I am gonna learn to do it myself, first step down
12-18-2022
BPella

Set all DTC from 3400 to 3460 to no error reported, you only need to do the ones checked on SES Enable.
03-03-2023
Levi414ers

Quote:

Originally Posted by village_idiot

This post started off bad, and then went worse...finally got better with Shrek thank god.

Literally just Engine > Fuel > Lean/Fuel Saving.... Top left toggle the DOD "enable" button to "disable"

If you want to go the extra mile, and delete the corresponding DTC's (I only do when we perform a mechanical delete), then go Engine > DTC's and delete the Cylinder Deactivation DTC's (P3400 to P3457 ish)

Based on what you said above, for clarification, if I actually go in and change parts to delete it. All I really need to do is shut it off in the tune? Or is there more to it?
03-03-2023
Tunercharged

Quote:

Originally Posted by Levi414ers

Based on what you said above, for clarification, if I actually go in and change parts to delete it. All I really need to do is shut it off in the tune? Or is there more to it?

Yep, just shut it off in the tune.
04-10-2023
ScoutSmurf

1 Attachment(s)

Any info would be appreciated!!!

I did a complete rebuild of my sons truck engine in a 2011 GMC Sierra 1500 SLE, 5.3l, LC9. I am currently having idle and misfire issues. Literally everything inside this motor has been replaced except pistons, piston rods, and Crankshaft everything was cleaned, machined, basically a new motor to include completely refurbished heads, non DOD GM camshaft, GM performance Lifters, pushrods, rockers, springs, oilpump, oil pump pick up tube, new plugs, plug wires, phaser, phaser solenoid, timing chain, all new bearings, rings, non DOD valley cover, new cam position sensor, VVT Sensor, oil pressure sensor, verified MAF was working, throttle body spacer, Shorty Headers, using factory Cats with all O2 Sensors, and Duel cat back exhaust. TBH, I am at a complete loss as to what else I need to do or what it is that I may have missed, thought I had pretty much covered all bases and am in dire need of good help!!!

I did the tune with the MPVI3 changing the following settings:
Engine>fuel>Lean/Fuel Saving>DOD Disabled
Engine>fuel>Flex Fuel>Flex Fuel Disabled
Engine Diag>DTC's>P3400-P3457
Transmission>Torque Converter>Use DOD Slip Disabled

I did have engine racing to 3000rpm issues which was caused by cleaning the Throttle Body and did do the Clean Throttle Body reset as well as replaced the TPS, did the Crankshaft relearn at which point the engine race issue went away leaving me with the same issues as mentioned above. I have double checked, triple checked all connections and made sure everything was right and tight. Any help concerning this would be greatly appreciated.
04-10-2023
2xLS1

It doesn't really help to post the same thing in multiple threads.
04-10-2023
ScoutSmurf

Quote:

Originally Posted by 2xLS1

It doesn't really help to post the same thing in multiple threads.
04-11-2023
ScoutSmurf

Not everyone is following every thread and I posted it in two threads that were closely related to my issue!

Based on what you said in the other comment, I?ll do what you suggested and verify the cylinders during a drive on the logger. The misfiring is when in gear or while driving as well as the idle is low at idle around 650-700rpms and drops to around 450-500rpms in gear.
07-24-2023
garielbea

Quote:

Originally Posted by ScoutSmurf

Not everyone is following every thread and I posted it in two threads that were closely related to my issue!

Based on what you said in the other comment, I?ll do what you suggested and verify the cylinders during a drive on the logger. The misfiring is when in gear or while driving as well as the idle is low at idle around 650-700rpms and drops to around 450-500rpms in gear Uno online.

It's completely understandable to post in multiple related threads to increase the chances of receiving helpful responses.