hello every one im having problems with my p38 range rover 4ltr on a gems system is doing around 7 mpg i have done a few things to it to try and sort but i am now stuck for where to go with it list things changed to also fix miss fire to lamda sensors,ecu temp sensor,and also 2 diff maf...

hello all hope some 1 can help i have just bought a n reg p38 4 ltr with lpg conversion with a dream xx1 system on it and was all running fine till a few weeks ago and have now got a miss fire on both gas and petrol and cant seem to resolve the problem i was getting aroung 200 miles from about...