I spoke at length today with an engineer from FoMoCo. We got to the topic of DPF deletes.
ANY TAMPERING WITH THE DIESEL PARTICULATE FILTER ON A 2008+ TRUCK IS IMMEDIATE GROUNDS FOR WARRANTY REFUSAL -- NO QUESTIONS ASKED.
This is from FORD OF CANADA, not the dealer I work at, or a dealer near me, FORD CANADA.
The reasoning behind this, is you've tampered with an emissions component. Poof. There goes the emissions warranty. Now, you've had to MODIFY the PCM programming to outside it's normal parameters (Unless you're running the export calibration, which I doubt any of you guys are doing, since it's a de-rated tune) and this is considered tampering also, on the powertrain level, since the module is commanding powertrain components to outside their design parameters.
Now, A lot of guys will turn a blind eye to this, but from time to time, if an engineer or a warranty inspector comes out, you may run into issues, especially with an engine related failure. A lot of 6.4 failures go beyond the prior approval level and need to have an inspection done by Ford of Canada to approve the warranty repair.
I don't know for sure, but likely they will be looking for tool marks, freshly installed components, and the like. It is to my understanding that Ford has a LOT of poop in the PCM that can be accessed on an engineering level, and this may include how many times the module has been flashed, what calibration was in it last, etc, etc. I know there are a few indicators I can see (being that I'm an IDS 'Power User' and know a bunch of stuff that I'm probably not supposed to
) or even at the regular level using the regular IDS software that can indicate a recent PCM flash.
Just throwing this out there.
Be careful, and in some cases: you will have to pay to play.