Guys, some advice please, I have sort of acquired my parents 4.0 97 GC, it has had a multipoint LPG conversion and gentle bimbling is giving about 15mpg, throttle response isn't as crisp on lpg either, I'm wondering whether it is set up right ( I has a LPG Monaro a few years back and you really couldn't tell whether it was running on LPG or petrol).
Does the fuel consumption sound right, I'm sure if I wasn't being economical I could easily have it down to single figures?
Thanks