LPG problem on 4LTR Range Rover

[GeorgeGreece]

I have the latest Multi step LPG conversion fitted to my RR (Type Milano). When changing back to Petrol the engine misfires, loses power etc. After a while, (keeping the aircon off) it seems to reset itself and run fine again. However, when switching to LPG and back to Petrol again. The same problem. The misfires could cause damage to airflow meter. Seems also when running back on the petrol the fuel consumption goes up by half the milage per gallon! Also when diagnosing ECU stored faults all sorts of problems come up. Faulty cam sensor, lambda sensors & catalyst converter (very expensive to replace). However, when clearing these and running on petrol again and re-checking the ECU stored faults, they all dissapear (except the cam sensor, which has been changed anyway). Any ideas please? George in Romania.