[Chrisund123]

No idea how akin the engine is to the regular L-series, but do check the wiring/plug to #1 injector for chaffing/corrosion. Also try disabling the EGR valve.

 

[Chrisund123]

Thank you for the suggestions, but let me explain a little better what I mean with “stay accelerated above 1000 r/min”, in fact when I stop the car for example in a red light, the engine comes to the idle speed of 1250 r/min but should come to the normal regime which is 750 r/min.This happen sometimes is an intermittent problem.
The computer test was done using the Land Rover tools connected to the car to interrogate the ECU, no faults detected.
I don´t think that the poblem is in the acelerator pedal, is more an electrical problem.
Any way I`m going to following your suggestions then I let you know about the results.
Cheers
Fernando

It probably wouldn't be the pedal that's at fault, it would more likely be the throttle position sensor.