Would replacing the battery affect the Ford Performance Tune?

[ben8jam]

I had the tune done mid Jan 2022. One change I noticed after the tune was done, was the Auto-Start-Stop was permanently disabled. The truck acted like it was turning itself off, but it never really did.

Then in late Feb I started to get issues with the battery: default system chimes when turning truck on in morning and the touchscreen display saying the system was powering off to conserve battery (when getting IN the car).

Today I went to Ford and they determined the battery needed replacing, so they did so under warranty, no issues.

When I picked up the truck and drove off I noticed the auto-start-stop was back to working, which left me wondering if somehow something from the Tune was reset. And of course then I started to second guess the power difference.

So the question is, does replacing the battery and reseting the battery monitory system have any impact on the Ford Tune?

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[Utah_Bound]

Ford may of updated the ECU when they had it in for a battery? Which would of over-written your tune. Otherwise I dont see how. When you tune a vehicle you overwrite the data, that is why you have to have your OEM tune on a tuner to return it to factory. But if Ford updated while it was in for service, It most definitely would, as updates overwrite the data as well. Happened to me twice with my Type R because the Honda dealer "had an update" while I was in for something completely unrelated to a tune. You may call and ask the service writer. Unless there is something I am missing here?

 

[ben8jam]

There are no notes in the service receipt about updating anything other than the Battery Monitoring System. They tested the battery worth a midtronics tool.

If I hook up the Ford ProCal can I see if it is still in place? I had the tune applied at an ASE tech but they are a bit of a drive.

 

[Rp930]

I had the tune done mid Jan 2022. One change I noticed after the tune was done, was the Auto-Start-Stop was permanently disabled. The truck acted like it was turning itself off, but it never really did.

Then in late Feb I started to get issues with the battery: default system chimes when turning truck on in morning and the touchscreen display saying the system was powering off to conserve battery (when getting IN the car).

Today I went to Ford and they determined the battery needed replacing, so they did so under warranty, no issues.

When I picked up the truck and drove off I noticed the auto-start-stop was back to working, which left me wondering if somehow something from the Tune was reset. And of course then I started to second guess the power difference.

So the question is, does replacing the battery and reseting the battery monitory system have any impact on the Ford Tune?

The start/stop is working because of the new battery not the tune. Low battery voltage will keep start/stop from working.

 

[ben8jam]

The start/stop is working because of the new battery not the tune. Low battery voltage will keep start/stop from working.

AH! That makes a lot more sense, I didn't put those two together. That's very odd though that the start stop 'stopped' right after the Tune. Wonder if the tune affects the battery usage? I'm taking out of the air here...

So, then it's likely my miss-assumption that start-stop starting working again - means the battery and the tune likely have nothing to do with each other...

Is there anything useful that ProCal will show if I hook it up?

 

[Jmarler]

Not sure, but you could reflash it just to be sure. It's pretty straightforward. I have livernois but it uses same tuner.

 

[Rp930]

The tune had no effect on the battery.

 

[Jmarler]

AH! That makes a lot more sense, I didn't put those two together. That's very odd though that the start stop 'stopped' right after the Tune. Wonder if the tune affects the battery usage? I'm taking out of the air here...

So, then it's likely my miss-assumption that start-stop starting working again - means the battery and the tune likely have nothing to do with each other...

Is there anything useful that ProCal will show if I hook it up?

I just looked at mine,I have the livernois procal and I don't see anything that shows what is installed.

 

[JesseS]

The system will disable the ASS to save battery power (less starts) so when the new battery was installed and the BMS reset it started working again. Your Tune is in a EPROM (erasable programmable read only memory) and is not affected by a battery change.

 

[ben8jam]

The system will disable the ASS to save battery power (less starts) so when the new battery was installed and the BMS reset it started working again. Your Tune is in a EPROM (erasable programmable read only memory) and is not affected by a battery change.

Thanks - that makes a lot more sense. It's just so odd that the start-stop stopped working the day I picked up the truck from tune.

One other weird thing, now that I have the new battery - the steering assist is much stronger. I know that sounds odd, but I haven't felt it really grab the curves in a while and today getting on the highway, it felt like it pulled the wheel out of my grip hugging the corner. Also the last few weeks it's been telling me to keep my hands on the wheel, even when they have been. So I guess a lot of the sensors perhaps rely on the battery.....? Or maybe the disconnection of the battery reset something....

 

[JesseS]

Thanks - that makes a lot more sense. It's just so odd that the start-stop stopped working the day I picked up the truck from tune.

So I guess a lot of the sensors perhaps rely on the battery.....? Or maybe the disconnection of the battery reset something....

Both

 

[D Fresh]

More likely your battery dying was keeping the ASS from working.

 

[Frenchy]

I had the tune done mid Jan 2022. One change I noticed after the tune was done, was the Auto-Start-Stop was permanently disabled. The truck acted like it was turning itself off, but it never really did.

Then in late Feb I started to get issues with the battery: default system chimes when turning truck on in morning and the touchscreen display saying the system was powering off to conserve battery (when getting IN the car).

Today I went to Ford and they determined the battery needed replacing, so they did so under warranty, no issues.

When I picked up the truck and drove off I noticed the auto-start-stop was back to working, which left me wondering if somehow something from the Tune was reset. And of course then I started to second guess the power difference.

So the question is, does replacing the battery and reseting the battery monitory system have any impact on the Ford Tune?

So I can already tell you that the Ford performance tune most likely does not disable the auto start-stop. Reason for this is most likely to keep the warranty intact. Chances are what happened for you is the battery was weak at the time and it decided to keep auto start stop off at that time. Once you put a new battery the computers were able to see a good battery and use auto start stop again

 

[DoctorsTARDIS]

I have the Ford Performance tune and it did not disable A.S.S.

 

[Joeiconic]

AH! That makes a lot more sense, I didn't put those two together. That's very odd though that the start stop 'stopped' right after the Tune. Wonder if the tune affects the battery usage?

The tune installation instructions say to hook the battery to a battery charger during the installation process. So, if your installer didn’t do that, the installation may have drained your battery enough to put the truck in battery preservation mode and disable ASS. Especially if your battery was already in a weakened state, which it seems like it probably was.

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