2017 Silverado AFM Disabler

[MSCH]

THANKS! That was my next question... How to eliminate it but have it for inspection purposes.

I'm not up on your particular issue, but assuming you had the talent to install a tuning device, you should be able to install a stock tune into the ECM if necessary to pass an inspection. Just saying I have a diesel truck that has had weight loss surgery and have a tuner from EFI live where you download a tune into the EFI Live unit and then program your engine using the EFI live unit and the OBD2 port... not much to it to switch tunes from illegal to legal. Takes about 20 minutes to flash the ECM.

 

[NYEngineer]

I'm not up on your particular issue, but assuming you had the talent to install a tuning device, you should be able to install a stock tune into the ECM if necessary to pass an inspection. Just saying I have a diesel truck that has had weight loss surgery and have a tuner from EFI live where you download a tune into the EFI Live unit and then program your engine using the EFI live unit and the OBD2 port... not much to it to switch tunes from illegal to legal. Takes about 20 minutes to flash the ECM.

Hmmmm… good thought.

 

[NYEngineer]

I don't think they know if your AFM is not functional. In NJ where vehicles must have CA emissions, they just plug in to see if all the onboard emissions monitors have run the self-test and are ready and no codes are present. That's all they care about, so they qualify for Fed. highway funding.

That’s what we get too. Maybe I’m good to go.

 

[ls1mike]

Do they do a sniffer? Just put a stock size cam in it.

 

[clinebarger]

I'm not up on your particular issue, but assuming you had the talent to install a tuning device, you should be able to install a stock tune into the ECM if necessary to pass an inspection. Just saying I have a diesel truck that has had weight loss surgery and have a tuner from EFI live where you download a tune into the EFI Live unit and then program your engine using the EFI live unit and the OBD2 port... not much to it to switch tunes from illegal to legal. Takes about 20 minutes to flash the ECM.

In this case you would have to swap calibrations, Complete a drive cycle without it entering V4 Mode which generally works by running it in 5th. But if the inspector test drives it in D6 & lets it enter V4 Mode....It will set Misfire DTC's because the lifters can no longer collapse.

This assume New York checks CVN numbers like California or will in the near future?

 

[NYEngineer]

They don't drive em here. Just a safety inspection and hook up to OBD.

 

[K20FA5]

If one of the AFM Solenoids sticks open....It will cause both lifters on that cylinder to collapse, This is usually an easy remedied by pulling the Intake & VLOM, Then plug the 8 AFM Lifter Feed Holes or replace the VLOM assembly.

On rare occasions....A stuck open AFM Solenoid can cause a Mistimed Lifter Deactivation Event & damage the "Locking Pin Shelf" inside the lifter causing it to stick in the collapsed position.....I've had great success unsticking them, And as long as the affected lifter/s never get deactivated again.....It seems to be a permanent repair. Outlined HERE.

I guess in some people eye's.....A stuck collapsed calls for lifter replacement, I guess if you want the AFM to work again.....That's true.

For your particular concern.....Run a ODB-2 Splitter HERE, This one is GM style & will bolt in place of the original port, Then you can zip tie the Range Disabler & Splitter up under the dash.

If you install that splitter and leave the Range plugged in, can they still do emissions testing on the other port or does the Range have to be disconnected to run emissions testing in Texas? I’ve heard that they have to be disconnected, but that might be because there is no where to plug in the testing computer?

 

[That John dude]

The lifters fail when they don't reactivate after cylinder shut down, no shut down, no failure.

I had the range disabler on my 14 Sierra, and cylinder 6 lifter still failed.

 

[loneryder]

Makes me want to run out and buy a GM V8!

 

[4WD]

I’ve run range from mid 50’s to approaching 90k now …
Have never pulled it - but felt it protected the TC and had the potential to make the lifters last long. That said - the power train functions better in city and highway- no in/out shifts every time you cross an overpass on the freeway - and those crossings have been moving to the freeway in new construction (side roads don’t cross) …

 

[K20FA5]

I’ve run range from mid 50’s to approaching 90k now …
Have never pulled it - but felt it protected the TC and had the potential to make the lifters last long. That said - the power train functions better in city and highway- no in/out shifts every time you cross an overpass on the freeway - and those crossings have been moving to the freeway in new construction (side roads don’t cross) …

What do you do when they have to plug it in for emissions testing? We have to do that in the 4 county area around DFW.

 

[clinebarger]

If you install that splitter and leave the Range plugged in, can they still do emissions testing on the other port or does the Range have to be disconnected to run emissions testing in Texas? I’ve heard that they have to be disconnected, but that might be because there is no where to plug in the testing computer?

I don't see it being a problem....But I don't use Range devices either as I have HP-Tuners.