Range AFM Disabling Device

[Donpat]

Paul
Any comments on the Range AFM Disabling Device? Can it do any damage to the engine? Also, when in AFM, is it always the same 4 cylinders?
Thanks again!!

 

[catbert]

Not a clue, except it's always the same cyls are deactivated.

 

[kpic]

Yup, 1, 7, 6, and 4 are deactivated. If #1 is on its combustion event, #7 is deactivated; if #5 is on its combustion event, then #4 is deactivated. Always the same cylinders; but, which one is deactivated first varies.

There are a lot of complaints about AFM using oil excessively.

As it is a can device it doesn't change anything in the ECM; so it is undetectable unless you leave it in the OBD2 port and drop it off at the dealers.

 

[catbert]

Luckily (in a Vette) you can disable the 4 cyl mode at the turn of a knob.

 

[kpic]

I read that, as GM's and others versions use oil, I'd leave it off. GM revised oil consumption between changes upward because of AFM. Economy and emission haven't been good for the consumer's wallet.
I have a AFM disable in my truck. I don't know if it can be turned off electronically. However, as writing to the ECM can be detected and the truck is under warranty, I have an AFM disable and normal oil consumption.

I believe I read Honda's AFM is better; however, after grandson's Accord, Honda has lost a lot of their shine.

Not to change the subject, but although I build my computers; I'm more of a points and condenser type.