Lately my car has been being a bit of a butthole. Dual fuel 1.6 carby '85 Ford Meteor. My issue is that when I am driving it on unleaded, drives like a dream. Idles at around 750 rpm sitting at the lights and have no issues whatsoever.

However while on LPG, it refuses to idle at 750. Sits there for about 2 or 3 seconds then drops to 500 or until the engine dies. Today I checked the oil, and motor oil was low so I topped that off. Anyway since the top off it sits at around 750 for a little while (maybe a minute or so) and then drops back down to 500 and struggles there until finally engine dies.

Only happens on LPG :S

This has been occuring since a fill-up a few weeks ago. I changed petrol stations assuming it was just a bad batch of gas but after being to 6 different stations, same stuff occurs.

Any ideas what this might be? Thanks!

is it just on idle that it cuts out? how does it drive on gas?

is it just on idle that it cuts out? how does it drive on gas?

is it just on idle that it cuts out? how does it drive on gas?

oh no, i think i broke the server, its gone bonkers.
i wonder if it will post this reply 3 times as well?

just need to adjust idle mixture thats all on the econvertor...

post a couple pics and I will sus out where.