Performance after battery disconnect

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Don S

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This may be an odd question and just my imagination..... On three different occasions, my truck seemed to perform remarkably better after I disconnected and reconnected the battery. When I test drove the truck during purchase it ran well and I was okay with the performance. Later I added some mods which required that the battery be disconnected. When I next drove the truck it performed much better. On two more occasions, most recently last week when the radio froze and I disconnected the battery, the truck ran great. It was a difference between turning a corner and now at the same corner, the tires were chirping with the same throttle input.

I know the Allison transmission in my motor home actually learns your driving characteristics and adjusts.

So......do these things build a memory. I typically drive in NORMAL mode with a lot of around town driving. Any thoughts....or am I just imagining this?
 

isis

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What Octane gas do you run?
 

goblues38

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91 is not 93....so yes.....your truck is being detuned. When you do a hard reset, all the "learned" values reset. The detune from cheap gas is not instantaneously...it can take 20-50 miles, longer if you never "floor it" and get the anti knock to kick in.

Same with how the trans adapts to how you drive and change show it shifts.
 

JoeSC

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It could also be colder air outside, especially with turbos. I know sport mode is much more sporty now that it’s not 90 this week.
 
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