Will a dealer flash kill my tune? - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 10-13-2019, 05:06 PM Thread Starter
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Will a dealer flash kill my tune?

Hey guys - I took off all of my delete stuff and I’m back to stock now. Was gonna go to the dealer to have the activate remote start, and a couple other things. If they flash/update my pcm, will that screw up my custom time if I ever want to reinstall? I had an SCT X4 with PIP tunes.
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post #2 of 5 Old 10-13-2019, 06:21 PM
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If you took off your delete items, you should have also returned the truck to the stock calibration (removed the tune via the tuner). The pips should be stored in your tuner for future use.

If you did not return the truck to stock with your SCT X4, you need to do it. This will save your tune and pips and put the stock tune back into the PCM. If not, you might get all kinds of error codes.

Also, activation remote start will not cause any tune problems, stock or tuned. Nor will activation the exhuast filter screen affect your tunes.

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post #3 of 5 Old 10-13-2019, 08:22 PM Thread Starter
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yes Larry - tune was taken off and returned to stock, but like you say, should be stored on the SCT.

What I was concerned about is having them refresh and update my PCM while they're doing the other stuff.

I know the simple answer would be to just tell them don't flash my PCM, but there might be good updates on the new code. I know there has been some changes since 2016, if nothing else in the regen area. So i would actually;;y like the update, I'm just worried whether or not that would render my custom tune useless if I ever went back to the delete setup

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post #4 of 5 Old 10-14-2019, 03:50 AM
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Custom tunes are always stored on the device. I can't recall anyone ever reporting any Ford PCM updates that later on cause issues when loading custom files on the newer trucks.


I have most often heard from techs if there's no problems, they don't flash the PCM "just cause".



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post #5 of 5 Old 10-17-2019, 07:05 PM
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If you returned the truck back to stock, the SCT still has the custom tunes in it. If the dealer flashes it and then you get back home and loose the weight again. The SCT will store the "new" flash in it and you should be good to go.

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