Hard codes won't clear and P1000 will be present until all OBD monitors have completed during drive cycles.
Why do you or your customer have to be Speedy Gonzalez and try to remove the speed limiter on a brand new Ford work van that doesn't even belong to you 
If I could I would lower the speed limiter to 70 MPH and have the steering module keep f@cking trucks and vans in the right lane where they belong.LMAO

   I think the speed limiter is set for a safety compromise somewhere below the speed rating of the tires to figure the van likely will be carrying a load or a couple rows of passengers with  tire pressures typically running a few psi below what they really should be run at ,typically driven hard by a under paid employee like like a stolen vehicle. Ford and most employers probably don't want work and shuttle vans driven in an abusive manner  let alone be cresting a hill and getting air at over 70mph with a pallet of ceramic tile or 10 passengers on board. LMAO.
 Maybe if the 2017 Ford van's engine is fully broken in , you are the owner of the van with an ID and have replaced the standard H rated tires with V rated tires and the dealer confirms it. They call and get an  authorization code, they can re-flash it cheap to give you the higher speed limiter rating, a new tire information  label  and PCM  reflash tag. With Autel's legal woes with Ford , I don't think Autel is going to give us a working option to raise the speed limiter on any new Ford.

https://www.youtube.com/watch?v=loh1PN1hRHY