guys thanks for your thoughts on this topic, I dont want to void to many warranties right away anyway! There is a product in the vendor section here and they claim that all you do is plug their device into the diagnostic port and ALL it does is remove the cylinder dropping so its running on all 8 all the time, they also claim it voids NO warranty issues? Do you think this is true? I also dont want to screw up some future planned upgrades and have to start over on stuff because I planned poorly? I am looking hard at some Hennessy upgrades to the car, they have a 750 hp kit, any thoughts on that?
That AFM defeater is flawed in that it plugs into the OBD port under the dash and does NOT power down
when car is off so it not only drains the battery but also causes other controllers to wake up
You may find that OBD cable is in the way of your leg
As to warranty that is a BS marketing hype, what they are saying is if the engine blows up, first yank their controller out so dealer does not know it was being used and simply blame failure on GM.
I would not buy a condom from Hennessy and surely any work like that will void GM warranty and may have smog testing issues.
If wanting the mods then man up to not trying to make GM warranty claims and the AFM can be turned off in the tune.
AFM is not saving much in gas use, has long term failure issues and costs down the road to repair will be costly so just save all that buy turning it off in tune.
Since LTx engines uses direct fuel injection that means no fuel spraying onto valves and with 4 cylinders being turned off there is a lot more carbon buildup so if AFM is being used I suggest more often carbon cleanups being done.