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The only way I know to get your ECU "flashed back to stock" if you do not have the original stock tune in a tuner, is to pay a Ford dealer to do it.
what do you mean by "minus the cat delete" ?
minus catalytic converter. I talked to two Ford dealers this morning. The first dealer I spoke with said all he can do is update the ECM would that be the same is putting I it back to factory to you guys? 2nd dealership wasn’t sure.
Dealers will not support cat delete, because it is illegal -- meaning they will not turn off the rear O2 sensors, like can be done in a custom tune when you remove the catalytic converters, to suppress the Check Engine light
I'm pretty sure "update the ECM" is the same as "flash it back to stock" but I am not positive, they might be talking about something else . . . you need to be very clear with them, that you want to re-install the original factory tune in the car; assuming I understand correctly that is what you want to do. (they will need to get the original factory tune from Ford, because they do not have them all lying around)
Just to make sure -- what are you trying to accomplish? Why do you want to "do a stock ecu reprogram minus the cat delete" ?
Had a catastrophic event with supercharged motor. Found a donor motor out of a 06. It came with the ecm but would not start car. Anti theft would not allow it. Looking at putting supercharged ecm flashed to stock til sometime down the road.
I think I remember those other threads now, it's hard to pull together all these pieces to form a coherent story . . . are you NOT supercharging the car now? I definitely would not want factory tune with supercharger.
There is another complication: the factory tune is based on the car's VIN; meaning it is the tune that originally went with that car. But you have an engine out of a different car, which would have had a different VIN; and you need the right tune for that engine. Not sure how they are going to handle that, but I think you need to find a dealer who will make the effort to understand the story so they can provide the right solution.
SUPERCHARGED RED ROCKET ------------------Master-Moderator
Joined: May 11, 2006
Posts: 10,645
Likes: 2,512
From: Carnegie, PA
Originally Posted by djdaveofkc
Anyone in kc area that can do a stock ecu reprogram minus the cat delete?
Originally Posted by Bert
The only way I know to get your ECU "flashed back to stock" if you do not have the original stock tune in a tuner, is to pay a Ford dealer to do it.
what do you mean by "minus the cat delete" ?
Originally Posted by djdaveofkc
minus catalytic converter. I talked to two Ford dealers this morning. The first dealer I spoke with said all he can do is update the ECM would that be the same is putting I it back to factory to you guys? 2nd dealership wasn’t sure.
Originally Posted by Bert
Dealers will not support cat delete, because it is illegal -- meaning they will not turn off the rear O2 sensors, like can be done in a custom tune when you remove the catalytic converters, to suppress the Check Engine light
I'm pretty sure "update the ECM" is the same as "flash it back to stock" but I am not positive, they might be talking about something else . . . you need to be very clear with them, that you want to re-install the original factory tune in the car; assuming I understand correctly that is what you want to do. (they will need to get the original factory tune from Ford, because they do not have them all lying around)
Just to make sure -- what are you trying to accomplish? Why do you want to "do a stock ecu reprogram minus the cat delete" ?
OP! As mentioned above, no Ford dealer will re-program a stock ECU by disabling the rear 02 sensors, as doing so is illegal.. Not even aftermarket tuners will disable them anymore, due to the crackdown from the EPA..
If you want to run cat deletes, you can try and install what is referred to as 02 mini-cats, also know as 02 spark plug anti-foulers, but there is no guarantee they will prevent a check engine light from displaying.. However, this will not cause any negative issues with your car's engine.. If interested, I've went ahead and provided a source link.
I think I remember those other threads now, it's hard to pull together all these pieces to form a coherent story . . . are you NOT supercharging the car now? I definitely would not want factory tune with supercharger.
There is another complication: the factory tune is based on the car's VIN; meaning it is the tune that originally went with that car. But you have an engine out of a different car, which would have had a different VIN; and you need the right tune for that engine. Not sure how they are going to handle that, but I think you need to find a dealer who will make the effort to understand the story so they can provide the right solution.
If I understood his posts correctly from his other thread, he mentioned that he intends on running the donor engine for the time being paired with the ECU which has the supercharger tune from his original engine that blew up? However, he will be required to have that ECU reprogramed back to stock in order to run the donor engine, which is naturally aspirated..
OP! As mentioned above, no Ford dealer will re-program a stock ECU by disabling the rear 02 sensors, as doing so is illegal.. Not even aftermarket tuners will disable them anymore, due to the crackdown from the EPA..
If you want to run cat deletes, you can try and install what is referred to as 02 mini-cats, also know as 02 spark plug anti-foulers, but there is no guarantee they will prevent a check engine light from displaying.. However, this will not cause any negative issues with your car's engine.. If interested, I've went ahead and provided a source link.
If I understood his posts correctly from his other thread, he mentioned that he intends on running the donor engine for the time being paired with the ECU which has the supercharger tune from his original engine that blew up? However, he will be required to have that ECU reprogramed back to stock in order to run the donor engine, which is naturally aspirated..
that is correct. The anti theft wouldn’t work with the donor motor even though it came with the matching ecu for it. Had to put the original supercharged ecu back in to start up.
SUPERCHARGED RED ROCKET ------------------Master-Moderator
Joined: May 11, 2006
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From: Carnegie, PA
I'm sure your fully aware that you'll need to get the ECU which has the supercharger tune reprogramed with the stock tune in order to run your donor engine which is naturally aspirated, correct?
Ok, bottom linin' this: You're gonna need a tuner. They can fix it. They can come over to your place or you can tow the car to theirs. Unless you know how to do this, you will have to outsource it.
The other alternative is to get rid of the stock computer and put in a Holley or Haltech or Fueltec or whatever EFI computer system to run the car instead, which you can do because they *want* you do to that.
Of course, neither of these answers is the correct answer, legally, regarding the cats, and in fact is not necessarily for 'on road' use if you don't make it sniff like the stock car setup, but if you simply don't care about that, or are racing anyway, then those are your correct answers for you.
Got a tuner coming out to the house on Thursday so I’m excited about that. quick question for you guys I stuck the injectors from the supercharger motor on when we were Trying to figure it out. Do I need to put the Factory injectors back on or can the computer adjust and handle bigger injectors?
SUPERCHARGED RED ROCKET ------------------Master-Moderator
Joined: May 11, 2006
Posts: 10,645
Likes: 2,512
From: Carnegie, PA
If you intend on running the ECU which has the supercharger tune? you will need to either re-flash back to stock or select from any of the pre-loaded tunes which come included with the tuning device..
You cannot however run a supercharger tune on a naturally aspirated engine. If the hand-held tuning device has a listing of different injectors to select from in the end user menu? then yes, it can be done..
However, If there is no option to select from, you will have to put the factory injectors back in, or locate a tuning specialist who can write up a custom tuning file to upload into your hand-held programmer via e-mail which includes a tune to run larger fuel injectors.
Last edited by m05fastbackGT; May 9, 2022 at 07:32 PM.
Hey guys, well it's running and driving! Got to cruise around tonight with the top down enjoying the 75 degree weather! The tuner came out and the first thing is i had to put the donor brain in the car because i was converting it to a automatic for my daughter. (don't be mad, she tried and tried to learn the stick and the heavy duty clutch was a bear to push). Next i had to go get a second key because my spare was a clone. Had a few issues to work out. I had no communication to the transmission (was a plug) then i had it die with the misfire cylinder 6 code. With a extra motor i was able to put my msg coils on it and the code went away but it would all of a sudden die. Found a vacuum leak and replaced that hose and bam, running and purring like a kitten. I want to thank all you guys for your help. I'm sure when we re-supercharge it down the line i'll be learning even more! Just in time for my daughter's graduation next weekend also!
