Hi my Terios which i have converted to run on LPG as well has suddenly started to have an idle speed problem. when i start it it goes to normal speed of around 1800 rpm. when it warms up it goes down to 850 rpm which is normal as well. After a while the idling speed goes up to 1800rpm again stays like that for about 45seconds and goes down to normal again. This happens only when i'm stopped. During driving it runs normal, I thought it had to do some thing with the LPG but this happens as well when i'm on petrol only so i guess it has to do something with the engine itself has anybody any ideas as to what is causing this many thank\s RM