LPG Issue, Lambda VIP 100

Hi guy's, so some of you may have seen a thread below:

http://www.landyzone.co.uk/lz/f16/rescuing-knob-sunday-evening-190161-5.html

I got my rangie a little stuck in quite a bit of water, any way we recovered it started it and did some green laning on the way home and since I have left it to dry off for a couple of weeks.

My issue now is the LPG is running lumpy and it started as soon as I had recovered it.

It has a Lambda VIP 100, the light is showing AMBER. I know that I can play with it to tune it up a little my self, question is how?

Any advice welcome as i'm not really looking forward to the idea of running on just petrol......

Thnaks

find a local lpg workshop, the ones in my area i have been to are very helpfull, and fair prices, does it run well on petrol or rough aswell?

It's just running lumpy on LPG. I have adjusted the inlet and its much better but under acceleration it feels like its holding back a bit so maybe adjust the mixture?

Yeah , mine runs very well on petrol revs well, but on gas does go but not feeling as happy, could be its bot getting enough fuel, and or right mix, do you have a clear spark plug to see what colour you are getting?

Is it carb or efi?