Want to shut off the AFM - ModernCamaro.com - 5th Generation Camaro Enthusiasts
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post #1 of 3 Old 05-19-2016, 04:18 AM Thread Starter
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Want to shut off the AFM

thinking about shutting off the AFM on my car. How much will it negatively affect fuel mileage?
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post #2 of 3 Old 05-19-2016, 04:09 PM
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Shut it off on my '13. '12 and '07 Avalanche 5.3s and it made no difference in mpg at all in normal mountain and small town driving. Did make a difference once a long flat 300 mi. trip on an Interstate at a constant 55-60 with no stopping about 80% cruise control in V4......whoopee! AFM saved a whopping 2 mpg when driving like grandma on an Interstate compared to normal driving on the return trip.

Used the Range Technology device which plugs into the diagnostic connector....works great and keeps a constant V8......returns to AFM as soon as it is unplugged with no footprint in the ECM to void warranty.

One reason I purchased a V6 Camaro is because it is cheaper and the other because it uses all its cylinders all off the time and not some GM gimmick to save a spoonful of gas.

Current Chevys - '15 Camaro LS '16 Silverado LT Z71; '16 new Malibu LT; '15 Traverse LT2
Previous Chevys: '13 Avalanche; '12 Avalanche LT; '11 Tahoe LT; '11 Malibu LS; '08 Trailblazer; '07 Avalanche; '06 Colorado WT....'80 Citation (POS); '75 Impala; 72 Chevelle; '69 Camaro R/T; '65 Impala SS; '62 Nova; '53 model 210
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post #3 of 3 Old 06-04-2016, 06:02 AM
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Less miles per gallon...but a lot more smiles per gallon.

2017 Camaro ZL-1 A10

2013 Jeep Grand Cherokee Hemi 5.7 - Tuned!!

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