DoD/AFM tuning Help Needed
Hi Guys,
I am trying to tune my vehicle (Jeep wrangler JKUR with an L86/8L90e and 37" tires) for maximum fuel economy in city/highway driving.
The L86 has so much torque that in theory, with 4:10 gears, I should be able to have 4Cyl mode active during city/highway driving.
I currently have the DoD/AFM enabled and have tuned the transmission to stay between 1,400 and 2,000 RPM at low throttle.
Now DoD/AFM is enabling itself at at around 16 MPH and is on most of the time.
Here are my questions:
1- In general, will long term use of DoD/AFM affect or damage the engine in any way? Is it better to disable it for a heavy vehicle? I am concerned that the constant enabling/disabling of DoD/AFM will cause internal components to fail prematurely.
2- I use regular gas on my L86. I do hear some knock when the engine RPM is low and instead of downshifting, the engine tries to build cylinder pressure by phasing the cam to create more torque and pull the load. I will try to use premium and see if it makes a difference. But in theory isn't the engine supposed to adjust timing after getting knock feedback from the knock sensors and get rid of the knock ?
3- Is there a way to disable DoD/AFM until a certain RPM ? I would prefer it to engage after 1,500 RPM.
4- Is there a way to disable DoD/AFM until a certain speed? I would prefer it to engage after 40MPH. (Would Min VSS + Min VSS Hyst do it?)
Thank you!