Three year old transit

My tranny diesel is out of warranty (just out) I have a problem, the vehicle will not rev until I turn the key back off and on again. not sure where the
fault lies can anybody help?
Fluke
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my transit is 13 months out of warranty and i have an intermitant problem where it loses about 99 of its 100hp when it rains. I have to date spent around 1000.00 on parts listed .Intake air temprature sensor,throttle control,turbo boost pressure sensor,new ford ecu also i have checked all wiring looms. anyone any suggestions ? please
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