[karasu]

Hey there.

Getting a few issues occuring with the 5.0 2012. The most recent is an apparent loss of power or low end torque that seemed to appear after a reflashing of the ECU at the local ford dealership. The informed me that no trouble codes were showing and that there should not be any issue. The power drop feels to be at low rev range between 2000 to 4000. Most noticabe when in a taller gear at low speeds. When new, the vehicle pulled very strong using torque to get it up to speed. Now sluggish. Feels like it is towing a heavy load.
Ford tell me that it may be the updates from the factory that have been installed. I have a 3.55 axel ratio and that should help it get out of the blocks a lot quicker. Am I imagining this? Is Ford pulling back the performance after the first service for economy? Friend have commented on the performance of the vehicle, asking what happend to it and why is it so bogged down. Something is up.

 

[bluebyu12]

Buy a bama tune then to get your power back and some. Its possible the reflash could be more conservative.

 

[karasu]

Yeah, Got the SCT tuner and it wont recognize my ECU. So Tunes are off the list for now. Thinking that you are right with the idea that Ford introduce more timid settings. The SCT tuner wont co-operate since the ECU was re-flashed. I compared to another Mustang and it does seem that something is missing from mine. Will have to wait for a solution from SCT. Bama tunes are the ones to get? I see many out there. Brenspeed for one. All claim to be the most powerful with the most gains. Found the stratagy tunes that were loaded made zero difference. Thanks for your input.

 

[WhiteBird00]

Did you have a tune loaded prior to the service? And did you return it to stock before taking it to the dealer? I have heard that getting an update from the dealer while an aftermarket tune is loaded can lead to all kinds of problems.

 

[ssimaniac]

I understand what you're talking about. I had the same **** happen to my car. It was terrible. I had them recently re-flash the ECU to the new firmware. Right away it was pulling better.

 

[karasu]

So a re-flash one more time might fix it? I did return it to stock before taking it to the dealer. It has just lost its guts. Nothing I can realy explain to the service agent. Just does not feel right. Might wait for a tune to come up through SCT. There seems to be an existing issue with the ECU being un-supported. The say 2 weeks for a solution.

 

[Bobby B]

The idea that a dealer would re-flash the ECU without explaining the changes and getting the owner's permission blows my mind. It's outrageous that a dealer would change the performance you paid for without your consent. I consider it stealing!!!:nono:

This post is a wake-up call to me, so that I will warn my dealer not to re-flash the ECU without my knowledge.

Is there a way to download the original factory tune so it can be reloaded should the dealer violate my Mustang?

 

[Brenspeed]

Any custom tune is going to give you a HUGE increase in power as well as increased throttle response. We have 3 2011+ test cars here in house that are our own personal rides and we use them to test just about every part on our website for the 2011+ cars. Tuning these new Coyote engines is no joke and you definitely have to know what you are doing. We've used these three (2 auto, 1 manual) cars to test all of our custom tunes for both N/A and S/C applications. Feel free to give us a call at 574.594.9559 if you have any questions. We are here to help and dont work off of commission so we arent going to sell you something you dont need

 

[Guest]

The idea that a dealer would re-flash the ECU without explaining the changes and getting the owner's permission blows my mind. It's outrageous that a dealer would change the performance you paid for without your consent. I consider it stealing!!!:nono:

This post is a wake-up call to me, so that I will warn my dealer not to re-flash the ECU without my knowledge.

Is there a way to download the original factory tune so it can be reloaded should the dealer violate my Mustang?

A dealership is not going to update software in the ECU for no reason. There would have to be a concern the customer originally brought the car in for that would be addressed by the update. Techs are not going to do work that they won't get paid for, and if the customer did not complain about something there would be no warranty justification to perform the update and get paid.

If you came in for a hesitation, or a check engine light, or whatever, and during the process of diagnosis a software update is recommended, then it will be performed. If by doing the update a new problem occurs(such as a loss of power) that would be cause to fix that problem separately under warranty.

 

[mallen]

A dealership is not going to update software in the ECU for no reason. There would have to be a concern the customer originally brought the car in for that would be addressed by the update. Techs are not going to do work that they won't get paid for, and if the customer did not complain about something there would be no warranty justification to perform the update and get paid.

If you came in for a hesitation, or a check engine light, or whatever, and during the process of diagnosis a software update is recommended, then it will be performed. If by doing the update a new problem occurs(such as a loss of power) that would be cause to fix that problem separately under warranty.

Sometimes there are tsbs that state that a procedure is to be done whenever a car hita the service dept tgat has not had it done. Think of it as one step below a recall.

 

[Guest]

Others in this thread are saying their car seems to be pulling better under the new update.

http://www.allfordmustangs.com/forums/2011-mustang-talk/327109-new-tsb-calibration.html

I have a 2012 gt auto. Will they possibly upload the newer tune to my car? I don't want it if it takes power away.

 

[karasu]

ongoing

Well, seems some interest has been stimulated from my original post. It is really good to hear different view points. Seems results vary. Let it be noted that I am living in the Middle East and that simple things are NEVER simple here. The smallest issue is met with complete confusion. My only hope is experience from others and trial and error. Having said that, anything under warranty has been delt with.
I have a SCT tuner (as mentioned in previous post) that is not recognizing my ECU and was waiting to install my C&L intake, which I guess will be the proof that there was an edit to my settings (with any power gain). SCT are working on an issue with the car with regard to the vehicles inability to take a tune. I get the impression that this is something that will crop up as more Mustangs have their first service. Also intresting to see that some have notice improvement in the reflash of the firmware, as per "2006gtfan"s comment. Thanks for the post from Brenspeed, I have already looked into a custome tune from there, and that will be the next step.

 

[karasu]

Others in this thread are saying their car seems to be pulling better under the new update.

http://www.allfordmustangs.com/forums/2011-mustang-talk/327109-new-tsb-calibration.html

I have a 2012 gt auto. Will they possibly upload the newer tune to my car? I don't want it if it takes power away.

......I would definately ask about the changes made to the firmware. If they reflash or alter the setup in any way. It just seemed to be a matter of due course. The dealer, as part of the service they will look for trouble codes and clear them if need be. The thing is, I had driven the vehicle for 2 weeks. It is the sort of thing that you only notice when you put your foot down and I never hammer the car straight out of the service. I was putting the loss of power down to ambient tempeture, using the A/C ect. But it is far more consitant than that when you are getting embarrassed by Toyota Camry's At the lights. I think the only way to know for certain is to put it on a dyno.