Hi, I have a series 2a running on 'Landi' lpg conversion. This saves lots of money, anyway, when the gas(lpg) runs out, and I change over to 'petrol', there is no difference, that is I can change it over while driving. The problem is, when I need to change it back to gas, it takes about 10 minutes of starting, to get going, in that time I almost drain the battery! I think most systems change over automatically, but I bought this vehicle already converted. Any ideas?? thanks