Disable AFM - Quickly

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Plimbob

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2007 Tahoe - 226,000 miles.

I have read that a quick and dirty method of disabling the AFM is unplugging the gray sensor by the brake booster. Is that true and other then the engine light being triggered are there any other downsides to doing this for a couple thousand miles as a test?

I have put 180,000 of the above miles and have experienced most of the issues outlined by others with the AFM.

I would like to test the process to see if my oil consumption improves. It uses about a 1/2 quart in 500-750 miles. If so I will purchase the Range AFM product.

Thanks for any feedback.
Tim
 

Drok

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Thats what i heard, if you disconnect the brake booster vac sensor itll shut it off. I didnt try it, cause i dont like unplugging stuff and having the eng light on haha. I went the range direction instead. (I have the range device im not using now that i have a tuner and if you do go that route i have it way cheaper then the range site) ;)
 

hyper z

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Not a good idea, it will trip a code, which in turn will have you running rich, which will give you worse gas mileage. Do it the correct way thru your computer.
 

jeffbco

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And if you have a CEL in many states you won't pass annual inspection.
 

sumo

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I would like to think that sensor controls more than Afm function. But if you'd like to be the pioneer in this experiment, I'm sure others would like to know the outcome. If t sets the mil, you can clear it after plugging it back in
 
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Plimbob

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Thats what i heard, if you disconnect the brake booster vac sensor itll shut it off. I didnt try it, cause i dont like unplugging stuff and having the eng light on haha. I went the range direction instead. (I have the range device im not using now that i have a tuner and if you do go that route i have it way cheaper then the range site) ;)
Derek, if you want to PM me with what you are thinking price wise that would me great.
Thanks,
Tim
 

Floep

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The ranger plug in gadget does the job; no cel does not come on warranty not voided , un plug it and it is back to normal
 

jeffbco

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The ranger plug in gadget does the job; no cel does not come on warranty not voided , un plug it and it is back to normal
Interesting too that I haven't experienced any OnStar interference as Range mentioned in their FAQ. My Range is plugged in 24/7 and I have received two months (March and April) of OnStar diagnostic reports with no mention of anything plugged in to the OBD port. It's a great device.
 
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Plimbob

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Is anyone experiencing a battery drain using the device. I read in another thread several user experienced a dead battery and attributed it to leaving the AFM disableer plugged in?
 

jeffbco

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Is anyone experiencing a battery drain using the device. I read in another thread several user experienced a dead battery and attributed it to leaving the AFM disableer plugged in?
My 2017 Yukon is two months old - Range plugged in 24/7 no battery issues. Car is driven short distances 5 days out of 7.
 

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