RE: ACTIVE FUEL MANAGEMENT

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RE: ACTIVE FUEL MANAGEMENT

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Chevrolet Forum >> Chevy Trucks, Vans & SUV's >> Silverado >> RE: ACTIVE FUEL MANAGEMENT

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RE: ACTIVE FUEL MANAGEMENT - 7/24/2007 6:23:33 PM

blackmax

Posts: 28
Joined: 7/24/2007
Status: offline

I just bought a new 2007 VortecMax with Active Fuel Management. The best i have seen, and mine is not broke in yet. 17hwy/ 14city. But like i said, i an only using the computer in the truck to determine that. But i did not buy it for fuel economy. Just for towing and power.

(in reply to zirmar)

Post #: 21

RE: ACTIVE FUEL MANAGEMENT - 7/24/2007 6:27:19 PM

Old Coot

Posts: 101
Joined: 4/24/2007
Status: offline

I also have the 6.0 Max in a extended cab 4X4 and in 1300 miles it has averaged 14.5 by the computer.

(in reply to blackmax)

Post #: 22

RE: ACTIVE FUEL MANAGEMENT - 8/21/2007 10:22:32 PM

dhblack

Posts: 18
Joined: 6/15/2007
Status: offline

In a word "sucks"

The person who came up with this lame brain idea needs to be slapped!
I am an "old Lady" I do not hot rod. I get the yyo-yo mileage because this stupid engine spends all its time see-sawing up and down the hills around here 4 down hills 8 up hills. so the IS NOT any mileage improvement with this engine. I think as far as mileage goes I should have keep my 04 silverado extended cab. This engine was not thought out well or only tested in dead flat test areas. Oh yea my mileage 10-12 city maybe 16 on the road if there's no traffic. I'm looking for a way to "turn off the "fuel management"

(in reply to zirmar)

Post #: 23

RE: ACTIVE FUEL MANAGEMENT - 8/22/2007 3:47:23 PM

ZX1100F1

Posts: 2429
Joined: 8/1/2006
Status: offline

Actually the AFM provides the most significant fuel economy improvements during moderate speed and mountainous terrain driving conditions.

I'm fairly certain that the AFM is not responsible for any of your MPG inconsistencies.

(in reply to dhblack)

Post #: 24

RE: ACTIVE FUEL MANAGEMENT - 8/22/2007 8:29:28 PM

dhblack

Posts: 18
Joined: 6/15/2007
Status: offline

I drive the same roads, same times of day, same conditions as when I had my 04 Silverado (5.3 with 3.73)but that good ole truck gave me 16-17 in TOWN. 19 on the interstate. Any ideas what else could be effecting the MPG?????

(in reply to ZX1100F1)

Post #: 25

RE: ACTIVE FUEL MANAGEMENT - 8/23/2007 7:06:26 AM

ZX1100F1

Posts: 2429
Joined: 8/1/2006
Status: offline

How many miles did you have on your old truck?

How many do you have on your new Silverado?
What size tire/wheel on your new one?

(in reply to dhblack)

Post #: 26

RE: ACTIVE FUEL MANAGEMENT - 9/26/2007 9:49:29 PM

dhblack

Posts: 18
Joined: 6/15/2007
Status: offline

I had about 45000 mile on the 04 Silverado and the new 07 has 6,000+ on it. So the engine should be "broke in". It just seems like no matter how "easy" you manage the gas. the engine itself defeates the mileage by switching so easily to 4 cylinders (when the old engine just "coasted" when you let off the gas.) then lo and behold when you hit the bottom of a hill or go into a curve it "lunges" into 8 cylinders. Our hilly terrain highways lend themselves to cruise control but the engine does not. This engine should have been made an OPTION not put on all trucks. Some areas of the country do not lend themselves well to this sorry engine. The rest of the truck is great but you sure can't drive this truck past ANY gas station. IT WANTS TO VISIT THEM ALL!