Hi There

I will try describe this problem short and accurate, it all started when few mounts ago and happen witch out any reason i started the car run fine , left my yard , close the gate , pressed feet on the gas and boom , no power on acceleration at all. Called AA - they arrive connect magic computer , no fault codes - can not find the fault. Friend who is mechanic came , connect snap-on computer , we run live data (no fault codes) and the only no sens was that the air temperature sensor showing -40 , the car basically run "like the chock is on all the time" , we check all sensor (MAF, crankshaft pos , camshaft pos, fuel temp etc , few of them we replaced with new as occasionally during the time some fault codes appear ) , i try find the fault form 1st April 2014 until today (in free time) and so far all cable been check , all sensors been change , and now i run out of idea , If some one had the same problem please help.
The RR run only on petrol.

First off, it's normal to introduce yourself in the appropriate section befor asking for help.
You will get a better response in the Range Rover section, but if you replaced the MAF with a cheapo that could be the problem once the car has been started, unplug the MAF and see if it's better/different.
Engine temperature sensor failure will also make it run rich as if on choke.

Hi mate , thanks , but this is not going to work as soon as you unplug MAF the engine is swiching off, and as i mention MAF sensor is new (generic) ., since apirl 5 "mechanics" have look on this but only big BS , if comp shows no fault they do not howto fix it , try find specialist in Glasgow, Paisley - but no luck .

The best tool to use is a Hawkeye or Nanocom, or a Testbook from Land Rover. Snap-On are still generic. A generic MAF sensor may also not function correctly with the Rover ECU.

the testbook was connected as well and shows crankshaft position sensors was faulty , replaced with new and still the same, if you like can make a small video and post online