DOD Delete and New Jersey OBD2 Inspections

[TigerTruck]

Was going to do the DOD delete to my 6.2 Silverado when an acquaintance said it won't pass New Jersey inspection if I tune out the AFM. That is the only tuning change that will be made. Anybody else in New Jersey have this issue with inspections? I getting tired of the lifters failing. Finally out of warranty and it happened again. I have all the parts but now hesitant until I know I can proceed. 

[mikeyk101]

Maybe he was thinking about the Range AFM Disabler? I know in that if you pull the Range module just prior to you trying to do the emissions test, it will fail. It needs to be pulled well before the testing in order for all the sensors to be active and several start/stop as well as driving cycles. I found this out the hard way when I lived in Illinois. Once emissions testing done, it can be plugged right back in until next time.

 

As far as having the AFM disabled by a tune, I honestly don't know...

Edited December 24, 2023 by mikeyk101

[TigerTruck]

I do have the Range disabler and I use it. And yes, it needs to be removed with enough time for the monitors to reset. I am talking about doing a full DOD delete: Cam, lifters, block plugs. The computer will need to be retuned to shut off AFM permanently. I just want to know if New Jersey State Inspection will detect the tuning change to the ECM. Since the warranty has expired, I can do the full delete now or if there are inspection issues, just remain stock. 

[CamGTP]

If your state does the same thing as California, then you wouldn't pass. But if all your state does is make sure you have to check engine lights and can pass the readiness tests, you'd be just fine.

 

Just know that these new computers are very smart, you MUST have it tuned prior to you ever starting the truck again and all the codes MUST be disable to keep them away forever. If you start the truck with it not tuned and it tosses an error code for the AFM/DoD system it will likely be there in the background forever because once a permanent code is set it will never clear until the problem is fixed. But for you that problem will never be fixed because you removed all the parts.

 

If the codes are turned off before its started, the computer won't have a reason to toss a a code.

[TigerTruck]

So you are saying that if the ECM is tuned before the DOD conversion and there is no codes before the work is done, then I should be ok? I was thinking of getting a DiabloSport and do an 87 octance tune with the AFM turned off. My truck is ticking due to a bad lifter on cylinder #4 with no codes yet. This is the 5th time I have had this problem. The dealer covered the first 4 times. All on cylinder #4, or at least the last 3 were on cylinder #4. That leads me to suspect the VLOM since its always the same cylinder. And no, the dealer didn't change the VLOM on all the other repairs. The problem now is that the VLOM is not in stock anywhere. Since the last dealer repair was about 5 months ago, I plan of replacing the one lifter, one head gasket, and 10 cylinder head bolts should cost about $125. That will get me past my inspection on 2/2024. I'll have two years till the next inspection. If it goes bad again, then the full DOD delete or sell the truck.

[TheRiver]

"Peoplez Republik of Illinoiz" here.............................same communism, different state................................my 2016 5.3 was rebuilt due to a non AFM lifter failure, and rebuilt without all the AFM BS.  Passed the Illinoiz OBD2 plug in inspection without issue last year.  Had issue 2 years prior when I was running the Range device....................didn't get enough engine cycles in without the Range for it to pass.

[TigerTruck]

Update: Started disassembly today. Confirmed that one of the pushrods on cylinder #4 was bent. I replaced the pushrod and it opens and closes normally. The AFM lifters were replaced several months ago. Is it possible that I only have a bent pushrod? I have had and read so much about the AFM horrors that I am hoping I got off easy. So far I am only out my labor. I didn't dig into anything that will cost parts like coolant, fuel lines, or head gasket. I guess I can reassemble everything and see what happens. What does everyone think?

[CamGTP]

Correct, if you tune the computer prior to removing the stock camshaft and removing the VLOM and all that jazz, it should never set a light for any of those codes. You'd need a custom tune at that point to turn off every single code with that system. Not sure Diablo would have all that being that it's mostly pre-built "canned" tunes.

 

I use HP Tuners, so that is how I go about turning off codes prior to work being done.

[TigerTruck]

Update: I replaced the bent pushrod and reassembled. Restarted and tapping still there. Bitting the bullet and gonna replace the lifters. Once I get it through inspection, I'll tear it down again and do the DOD AFM delete. Was hoping to get off easy but no such luck. Looks like another $250 to replace the lifters. Also, it looks like the dealer stripped an exhaust manifold bolt. Easy to fix once the head is off. Really sucks that VLOMs are nowhere to be found. I think thats my issue.

[TigerTruck]

Update #2: I was able to obtain a new VLOM at a decent price of $220. Disassembled and replace the four AFM lifters on passenger side, installed VLOM and started reassembly. Torquing the 7th head bolt to the final degrees and it let loose. I guess having the head removed 4 times was the limit. Now I have to start over. I just purchased the NS300L head bolt rethread kit and will do all 10 head bolt holes. Youtube videos look straiaght forward on how to do the job. Now another set of head bolts and head gasket. I can just imagine what this would have cost at a dealer.

 

I found this video on youtube. He shows how the VLOM will fail causing the AFM lifters to fail. I did this test and yes, the solenoids leaked just like in the video.

 

 

 

[Diamond817]

What about all those Silverado's and Sierra's that were delivered without working DFM? I'm sure they will pass.

[TigerTruck]

In that case, DFM was deleted in the software by GM. Nobody has come forward with any answers that if I delete the AFM via tuner will it cause any issues with New Jersey OBD2 inspection. Others around the country have commented but nobody from New Jersey has confirmed or deny any issues.

[newdude]

Western NY resident here.  On my last truck I had AFM turned off via HP Tuners.  Never had one ounce of trouble plugging in for NYS OBD emissions inspection, passed every time.  Not sure if I would have had issues in the NY metropolitan area as the rules are enhanced down there but the OBD side of things it would pass there.  

Edited January 10, 2024 by newdude

[Diamond817]

49 minutes ago, TigerTruck said:

In that case, DFM was deleted in the software by GM. Nobody has come forward with any answers that if I delete the AFM via tuner will it cause any issues with New Jersey OBD2 inspection. Others around the country have commented but nobody from New Jersey has confirmed or deny any issues.

Probably because the 2019"s are only due for inspection this year. My 2021 inspection sticker is good until 2026. 

But I think you answered your own question - the DFM was deleted in the software.

 

 

 

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Edited January 10, 2024 by Diamond817

[steelerdude15]

On 1/10/2024 at 11:09 AM, TigerTruck said:

In that case, DFM was deleted in the software by GM. Nobody has come forward with any answers that if I delete the AFM via tuner will it cause any issues with New Jersey OBD2 inspection. Others around the country have commented but nobody from New Jersey has confirmed or deny any issues.

Do you happen to know anyone that does emissions testing in Jersey? If so, you could ask them and see what they say. The only state that I've heard of that goes in and actually looks for a tune is California. If Jersey doesn't do this, I'd think you'd be okay.