PDA

View Full Version : Disconnected battery - lost tune?


wx4caster
08-13-2011, 04:35 AM
Should disconnecting the battery cause the tune to revert to factory setting? I have Reinhart tune but since I got car out of shop it seems the custom tune is gone.
Thanks!
fastblackmerc
08-13-2011, 04:40 AM
Should disconnecting the battery cause the tune to revert to factory setting? I have Reinhart tune but since I got car out of shop it seems the custom tune is gone.
Thanks!

No. How do yo know the tune is gone?
wx4caster
08-13-2011, 04:48 AM
Thanks - I didn't think so but wanted other input. I'm not sure the tune is gone but it feels like the shift points have changed and lower idle RPMS -- only work done at Ford dealer was new master cylinder, coolant flush and seat heater switch replacement.

I have the tuner and tune so if it is gone will re-install.
Thanks again!
FordNut
08-13-2011, 04:55 AM
There have been instances of dealers updating the factory tune, not knowing that a custom tune was installed. If that happened, the tune that was in the PCM may be gone.
RF Overlord
08-13-2011, 06:59 AM
^^^what FordNut said^^^
wx4caster
08-13-2011, 09:33 AM
Thanks - I didn't think so but wanted other input. I'm not sure the tune is gone but it feels like the shift points have changed and lower idle RPMS -- only work done at Ford dealer was new master cylinder, coolant flush and seat heater switch replacement.

I have the tuner and tune so if it is gone will re-install.
Thanks again!

When Ford Service removed the CAI to get to the master cylinder, they did not re-install it correctly. Found this out by hooking up code reader and it was throwing a code for oxygen sensor. She runs puuuurdy now!:banana2: