the infof ile you posted is not asking for an update, which i would expect based on the images provided. Post a new copy of the info file please.

Dhmav51 wrote: Thu Jun 12, 2025 6:54 pm Thanks Mike. These are the ECM and TCM tunes exactly how they were in the car this past weekend.

this shows no changes to the speed limiter, which should mean the factory limiter of 200.7 MPH should be the only thing in your way other than power vs aero.

what sort of changes have you made?
Try going into any individual setting and see if it lests you change it or return that single value to stock.

please post the last tune written file from the i3 drive so i can sort this out for you.

Thanks for the visual, this makes sense to me now. One last thing is would some please get rid of this skip shift, i swear its gonna cause me to get into an accident. Thanks again.


skip shift should have been disabled by default, but i see it was not.
Load this custom tune to the device then to ...

this is a very old device....

what vehicle are you trying to tune?

palich85 wrote: Wed Jun 11, 2025 4:43 am I've the same problem. Can you help me? My info file

this device is not asking for an update?

when you go back into the parameter, its always going to default to 194, that does not mean that is where it is set.
In this screenshot, taken from your tune, you can see the target temp is 85*C across the board, which equals 185*F, therefore the pcm is attempting to target a 185 ECT.

why do you think it is not saving??
load the tune with the value set where you want it then attach the last tune written from the device so i can look at it please.

My 2016 5.7 6 spd is doing the same thing. I contacted Diablo and they told me it will not hit that 185 i'm looking for. I can't get it to drop in th 180's at all. I have the 797 thermostat delete and every single time i set it to 185 it will revert back to 194 or higher, lowest it will hit is 192 ...

if people were losing warranties for pcm swaps, you'd see it all over the place.
I am not familiar with it actually happening unless the vehicle was extensively modified otherwise.

Buy the swap kit, and just keep your core and pay the $600 core charge if you want to keep it.

nothing standing out, can you give us a call at 561-908-0040?

try SSI (southern speed inc)

both codes point to the rear o2 sensors, did you disconnect them? Check the harnesses, etc.

are you trying to raise it?
can you load the tune with it set where you want, then post a copy of the 'last tune written' file here from the tunes folder on the i3 drive please?