F550 2017 Speed limiter - need help

[richie_xcar]

Hey, first of, great Community. Never had to post anything Before as answers has Always been available by search.
We've previously done a lot of tire size Changes, some cylinder deactivation deletes, error code deletes, bu never any real big mods or tunes with the HPT.

Right now we have a F550 chassis 2017 4x4 6.7 diesel that needs the speed limiter removed. It's a fire chiefs truck, and they know about the tire speed rating and drivetrain risks and all of that, but they state they can't be limited to the 85MPH that their chassi came with.
From previous Writing we needed the BETA version of the editor, and the latest NET-frameworks, so that was all good. We checked error codes with the IDS, checked that there were no limit in the IDS before plugging in the HPT.

Problem 1:
- When trying to read the vehicle, only the TCM is read, the ECM needs to be added manually. We tried all available Ford-options. The only one that didn't give "FAILED"-status was the TC-1793 EDC17 ECM, Ford 6.7L Diesel 2017+, so that was the only one we could "use". The only one that completed the read without stopping.

Problem 2:
- With the TC-1793 we still get an issue, "the data you just read isn't from your vehicle, your vehicle isn't readable. The data is a supplied stock file. If you use this data to your vehicle you will lose any existing Changes your vehicle may already have". But we still got in and could use the software as we?ve done on previous vehicles.

Problem 3:
- We modified the speed limit parameters that needed to change, but then when trying to upload the data we got an error; "Unlicenced vehicle". We have the 8 credits that comes with the MPVI, the truck wanted 4 of those, which we locked to this truck. But our guess is the "unlicensed" -issue is related to not being able to read the ECM properly?

All these issues costed a flight to and from the customer to find out... :-/ So any help would be appreciated before going back to the customer. Ohh, and we have the stock HPT files pulled on the TC-1793 if that helps plus the VCM suite log from the vehicle.

Any help is better than none

[richie_xcar]

Let's see if we can kick off some better response on this one then.
Through the HPT-support and re-Reading the truck once again we got the ECM read, we changed all the speed settings to 200km/h+ (except for 160km/h on 4WD low). When we flew back from the fire dept. we left our MPVI so that we could help them remotely instead of flying over again. Once we got the modified tune in the truck they did a test-run. Now they could go 140km/h, but that's when it stops. So by changing settings from 130->200 we only got to 140?

Anyone want to look at the .hpt files to see if they can find anything else?

[Eric@HPTuners]

What is your support ticket number?

[richie_xcar]

What is your support ticket number?

Hi Eric, ticket 132455

[Scott_AZ]

Have you looked under

Transmission > General > Limits > OSS Max

OSS = Output shaft speed Limit. There may be something else odd limiting you other than the typical RPM/MPH/Fuel limits.

[richie_xcar]

Have you looked under

Transmission > General > Limits > OSS Max

OSS = Output shaft speed Limit. There may be something else odd limiting you other than the typical RPM/MPH/Fuel limits.

Thanks for tips Scott! No luck, see attached Pictures. No such options. I?ve gone through all other menu options aswell, and can?t see any limitations. If you go down a gear it still stops at 140 but with higher RPMs due to lower gear.

fuel.PNG
trans.PNG