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.

l had a similar issue had it converted to gas after a few weeks was running lke a bag of nails misfire on petorl backfiring but on ags was pretty good but not perfect.it had a k and n filter on so removed that fitted the original range rover air cleaner much better. any way our fitter was at the yard were we park our wagons and he said ive just bought a sealey code reader can l try it on your range rover(previously l had tried a coiple of code readers on it no codes) now the sealey came up with 2 p1319 and p0134 so we errased them now she is like excercet missile runs as it should so going to check again in a couple of weeks to see if they re appear my rangie is a 4.0ltr thor 2002 year . so l would tfy another code reader onit to b honest thats my theory anyway