Hiya Smaky,
I was hoping you'd post on this one
Oddly, I had no problem with the lpg in over 65k miles when it was fitted to my old 147. I swapped cars for a sele back in march and swapped the lpg kit too. As you rightly say it runs dandy on proper petrol but misfires on gas. The misfire is now consistent on cylinder 2 and having swapped a couple of coil packs about I can eliminate that. My real suspect now is the timing. I changed the timing belt just after I got the car and reckon I did a crap job
I will update after I have tinkered some more! Feel free to pop round and laugh at my mechanic skills anytime, I'm only in Wootton Bassett!
Mike