[Countrydalby]

I'm about to take possession of brand spanking new Mustang GT Premium with the 401A package. My question is around tuners. I'm assuming that I can use a tuner to download a new tune to get more HP out of the engine. And my plan is to, prior to the dealership working on it, reset the tune to factory.

I'm looking at the below:
COBB AP3-FOR-003 Mustang Accessport V3 2.3L EcoBoost 2015-2022 (cjponyparts.com)

Would love to know if others have done this and how difficult it is/isn't. And of course, if I should even consider doing it.

 

[Forddenial]

Apparently dealers can see any fingerprints from fiddling/tuning and can refuse warranty work if they can make a case that the modification to the tune was the case for the issue.

Something to keep in mind

 

[Cobrajet67]

If you get any tune that basically does anything other than speedometer/tire size recalibration then you will automatically void the powertrain warranty the second that you load an aftermarket powertrain or performance tune on the PCM. As mentioned the Ford dealer instantly knows if the original program was altered even if you load the original program back on it. Therefore, your plan to load the factory tune back on it won't work.
To do this on a brand new car is not a smart idea since pretty much anything that goes wrong with the engine or trans will not be covered under warranty. If you're engine starts knocking then you will be footing the bill yourself. If the transmission starts slipping or shifting erratically you'll be on the hook for the transmission repair.
You have a 5 year powertrain warranty so my suggestion is to do mods that won't void things on your car like cat back exhaust, suspension, or cosmetic stuff. A tuner in and of itself will not net you much HP anyway. You'll only free up like 5-10HP for buying a $500-$600 tuner. That Cobb brand is not really used with any of the custom tuners out there either so it's also not a great choice imo. SCT is what most tuners use. That link was also for an Ecoboost tuner and not for a GT.
Btw, your poll doesn't have choices that are suitable to vote on. Your "no" choice has a "can't trust the source" attached to it and that's too specific. You can often but not always trust the tuner(here's looking at you Bama.).

 

[JBert]

Personally, I probably wouldn't mess with it for a while, that brand new GT is going to offer a lot of performance right out of the box. I think I'd try it to see if I can really use any more, before I risked the warranty on my brand new car.

Then if you really do want more, I'd start with the tuner person; meaning who is going to write a tune for you, and what can they commit to regarding improvements. Then based on that you can decide if that is something you want to do; and then buy the tuner device that the tuner person prefers to work with. Most of the tuner devices do come with built-in "canned tunes" but generally (in the past) they were not very good, you really want someone to write a tune for your car.

 

[crjackson]

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Countrydalby,

If you get a “brand spanking new Mustang GT Premium with the 401A package”, you would be ill-advised to change the factory tune, or do any power-train mods at this point. The car needs to be driven and used during the warranty period in the factory delivered condition. Use that period as a “shake-down” run to ensure you don’t encounter any defects in manufacturing and assembly. If you modify now (voiding your factory warranty) and need an expensive repair, you‘ll see the wisdom of waiting.

If you must do some mods, stick to tires, wheels, mufflers, and cosmetic modifications or enhancements. I wouldn’t even bother with suspension at this point. As delivered, the car produces a tremendous amount of streetable power, and handles very well. Please be patient with the eagerness to modify, and you’ll be rewarded in the end.

Also, by waiting, more will be known about your particular year/model, and any potential pitfalls, that aftermarket providers & tuners may encounter.

I know well the desire to mod your car. I get it, but this should truly be resisted, at least until your warranty has expired.

Just my 2¢.

 

[Countrydalby]

Personally, I probably wouldn't mess with it for a while, that brand new GT is going to offer a lot of performance right out of the box. I think I'd try it to see if I can really use any more, before I risked the warranty on my brand new car.

Then if you really do want more, I'd start with the tuner person; meaning who is going to write a tune for you, and what can they commit to regarding improvements. Then based on that you can decide if that is something you want to do; and then buy the tuner device that the tuner person prefers to work with. Most of the tuner devices do come with built-in "canned tunes" but generally (in the past) they were not very good, you really want someone to write a tune for your car.

Thanks!

Greetings!

Welcome and thank you for joining ALLFORDMUSTANGS!
Please read the Site Rules if you haven’t already.
We encourage you to complete your Account Settings.
If you need help posting, please read this FAQ.

We’re happy you have chosen to be a part of our community.

Countrydalby,

If you get a “brand spanking new Mustang GT Premium with the 401A package”, you would be ill-advised to change the factory tune, or do any power-train mods at this point. The car needs to be driven and used during the warranty period in the factory delivered condition. Use that period as a “shake-down” run to ensure you don’t encounter any defects in manufacturing and assembly. If you modify now (voiding your factory warranty) and need an expensive repair, you‘ll see the wisdom of waiting.

If you must do some mods, stick to tires, wheels, mufflers, and cosmetic modifications or enhancements. I wouldn’t even bother with suspension at this point. As delivered, the car produces a tremendous amount of streetable power, and handles very well. Please be patient with the eagerness to modify, and you’ll be rewarded in the end.

Also, by waiting, more will be known about your particular year/model, and any potential pitfalls, that aftermarket providers & tuners may encounter.

I know well the desire to mod your car. I get it, but this should truly be resisted, at least until your warranty has expired.

Just my 2¢.

Sounds like a plan, Thank you!

If you get any tune that basically does anything other than speedometer/tire size recalibration then you will automatically void the powertrain warranty the second that you load an aftermarket powertrain or performance tune on the PCM. As mentioned the Ford dealer instantly knows if the original program was altered even if you load the original program back on it. Therefore, your plan to load the factory tune back on it won't work.
To do this on a brand new car is not a smart idea since pretty much anything that goes wrong with the engine or trans will not be covered under warranty. If you're engine starts knocking then you will be footing the bill yourself. If the transmission starts slipping or shifting erratically you'll be on the hook for the transmission repair.
You have a 5 year powertrain warranty so my suggestion is to do mods that won't void things on your car like cat back exhaust, suspension, or cosmetic stuff. A tuner in and of itself will not net you much HP anyway. You'll only free up like 5-10HP for buying a $500-$600 tuner. That Cobb brand is not really used with any of the custom tuners out there either so it's also not a great choice imo. SCT is what most tuners use. That link was also for an Ecoboost tuner and not for a GT.
Btw, your poll doesn't have choices that are suitable to vote on. Your "no" choice has a "can't trust the source" attached to it and that's too specific. You can often but not always trust the tuner(here's looking at you Bama.).

I had no idea they could tell. Makes sense since the computer runs everything now. Good info, thanks!