Posts: 348
Joined: 7/28/2007 From: Sterling, Virginia Status: offline
I'll get right to it....Has anyone had any problems with losing their custom tunes from a dead battery? Does disconnecting the battery for electrical mods cause us to lose our custom tunes?
I have read that reflashing and losing battery power are very similiar regarding the computer codes that Ford can read. (a reflash can be explained as a battery disconnect to install a car stereo) I just wonder if the effects are the same. Some of the equipment I work on leads me to think this might be true. If I remove the memory maintaining battery to some things I work on, it reverts to factory default settings.
I wonder if our cars are the same way?
Please post up if you have experience with this.
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"SKY" has: C&L CAI BAMA tunes, FRPP Duals W/JBA''s, SS "Eleanor" grill w/center fogs/tri-bar emblem, tints, Xenon side scoops, 1/4 window louvers. next: Eibach springs and D-specs, 3.73''s, t-loc, X-charger
I have disconnected my battery and it does not effect my 87 tune. I have discovered the reflash may fail if your battery is low. My battery does not seem to be low, but I now have to remove the fan fuse and fuel pump relay (per the instructions) or the relash will fail. I never had to do that before.
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2007 4.0 Premium-Satin Silver-Automatic Packages: Pony-Performance-Interior Upgrade Modifications: See Profile
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Battery disconnect and custom tunes? - 
