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retune needed when battery disconnected?

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Old 02-20-2011, 10:31 PM
  #1  
neo1674
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Default retune needed when battery disconnected?

do you need to retune your car after u disconnect the negative battery terminal?
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Old 02-21-2011, 05:16 AM
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loaded6shooter
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nope...
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Old 02-21-2011, 07:42 AM
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Nuke
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No. The tune stays in permanent memory. You may dump data in the adaptive learning, depending on how long the battery is disconnected, which MAY cause some drivability issues for the first xx miles but most people do this on purpose claiming it improves performance. Unless you drive very aggressively all the time, adaptive learning can cause a drop in perceived performance.

I've done it on a few occasions and my butt dyno perceived a minor increase in performance.
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Old 03-11-2011, 09:07 AM
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Nuke is right. It is stored in NVRAM just as the stock flash would have.
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Old 03-11-2011, 02:22 PM
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MustangFirstCar
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Nah man it stays. Just like the stock computer stays.
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Old 03-11-2011, 03:26 PM
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2007 grimlock stang
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Like everyone here says, nope. Actually, you may feel a good 'reboot' once you connect the battery back up. It'll feel like the first time you drove it before the algorithm began factoring in all the voodoo magic variables that it does LOL.

Many of us regularly do this simply for this reason alone.
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Old 03-11-2011, 03:54 PM
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kevinmalec
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NOPE ~ It's unanimous! When I had to replace out my battery, it was like loading the custom for the very first time. =-)
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Old 03-12-2011, 09:57 AM
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157dB
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https://mustangforums.com/forum/v6-s...ut-tuners.html
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