Congratulations Jack.
I still believe the guys that fitted my Prins system are indeed experienced. However, it worries me that, as I was told, they can only adjust two parameters on a Prins system - mapping (ratio) of gas vs. petrol at idle and when driving. If your suggestions are true also for my case than I believe that these two parameters are not enough to solve my issue.
I thought Prins was one of the best lpg systems!?!
I hope you won't completely forget about this thread.
Cheers,
Jan