When the car is warm the revs seem to bob up and down between 600 and 1100 rpm its almost as if its about to stall when it drops down. It wasn't so bad before but now its happening every time when stopping at lights etc gets very annoying and embarasing. most likely when its warmed up and on lpg.
what can cause this? maf sensor, oxygen sensor? whats the best one to replace first? car is zaffy z18xe and it has a missfire would this have something to do with it. cheers lads n lassies.