JaysonP13

I’m thinking about getting an AFM disabler and was wondering, will the disabler get rid of my check engine for AFM? I got new mufflers with no AFM. Also will a tune be able to disable AFM?

Richard Ames

Most tuners disable AFMAsk to be sure.

Blackwater0323

Diablo tuner from Holley works well and has many other useful features.

JaysonP13

So the AFM disabler won’t help me at all? Just tune it?

ChiefBoats

Had no tunes on my '14 and '16, the AFM disabler did its one designed job, eliminate the 4 cylinder mode, ran on 8 all the time. Had no CELs while installed.

F4Gary

New mufflers with no AFM?

ShadyVette

My AFM actuators were replaced last week under warranty and I have a 19 Grand Sport. I have an awe track exhaust to install now and remove the possibility of frying them again at the track.

aklim

I am trying a Diablew Tune so we shall see. He won't disable the emissions stuff but since you are not emissions, he might.

JaysonP13

No actuators

JaysonP13

I’ll be taking the car to get tuned in about a month so I’ll try that route I think.

aklim

I went that way because I didn't want to screw around with the dongle that I seem to be able to kick out. Besides, it does it the way I don't like which is to keep the monitors NOT in readiness state. Also, if I can change it through the ECM, I won't need the Soler throttle body that everyone seems to think is the greatest thing since sliced bread. This way, it is cheaper than both the items combined with the same effect and better, if I am understanding it correctly.

Shadowman10

If your car originally had the AFM actuators, you can’t just remove them and leave the wiring unplugged. It will definitely throw a code in the computer.
You should leave the AFM actuators plugged in and secure them under the car somewhere out of the way with cable ties. That way the computer thinks they are still operating.
I did that with mine and then bought a Range AFM disabler. It works great.

aklim

Why do the Range unit and unplug them? Couldn't you just leave them alone with the Range unit? It won't go into full readiness so the AFM won't engage. What difference would unplugging it make? Just curious since I am having it taken out in the ECM and leaving the stuff there

Shadowman10

One important detail I forgot to include is that my car came with Non-NPP exhausts so I bought a used set of Z06 exhausts that didn’t have the AFM valves. (Similar to buying an aftermarket exhaust without AFM’s)
I don’t have the NPP control system in my computer so I just have the NPP valves open all the time. Sounds great and not too loud.
Sorry for omitting that “small” detail. 😜

Chevyrelic

Maybe someone can enlighten me…and tell me what AFM functionality has to do with an NPP exhaust?

aklim

But what does the Range device have to do with it all?

ShadyVette

this thread is getting a bit out of control with some bad information.

Nothing they are two different sets of actuators on the exhaust system one set is near the exhaust flutes at the back of the car, NPP, and the AFM actuators are just forward of the mufflers and are activated when the car goes into V4 mode which are annoyingly part of the emissions system so if they break or are removed a CEL will be thrown.


Even with a range unit you need them plugged in when the car is started and the computer initiates a check on them to make sure they initialize properly. If not the CEL is thrown.

I use a range device and both my AFM actuators failed and they were just replaced. While they were broken my car had a CEL wouldn’t pass emissions cause of it.

if the car is driven hard the heat can destroy the AFM valves. Mine broke on track and as soon as they lost contact with the ECU a CEL was thrown. They don’t die all at once either. At first when the car cooled the CEL would go out. But after about 4 track weekends the CEL never went out.

My answer to avoid a repeat 4 hour labor job and 600 bucks in electronics is to install the AWE track exhaust and tie up the actuators.

Heres a video of the simulators on a Corvette, see 4:42.



Nothing. Though folks may think since they use a range and never go into v4 mode they won’t need them. Which would be nice but the integration into the emission system check ends that.

F4Gary

Or maybe just buy the AWE valve simulators.

Factoid

This^ is what I will do if/when the AFM actuators fail.

ShadyVette

My concern was but I’m not sure how valid it is, if I removed that actuator would there be a leak from the exhaust without that device covering area where the round part fits into there