Land Rover Defend without acceleration

Hello friends, someone can help me I have a Land Rover defend TD5 year 2006 that is usually left without acceleration in some cases, generally when they take it to the washing machine, I have been reviewing it and it seems like a communication problem in some reliable or something but I would thank you if they have any more accurate response.

If you have an electronic accelerator, never wash it again, because they make that fault and then it is no longer removed, and the replacement has a very, very high value.

Electronic accelerator is signed but the fault has sometimes occurred and has been fixed by cleaning the relays but now it does not work and the accelerator sometimes works and sometimes not any idea ???

Hello work in a mechanic company that we have about 40 defending with this symptoms the gas pedal potentiometer usually fails the diesel pump that is in the deposit and they run out of good power if I can help you you already know

Thank you for all the answers the fault was in the main cable harness that goes from the sensors to the computer, for some reason entered water to the harnes and this was occasionless a short circuit that is why the fault was intermittent, once the harness the harness was dry.