a lumpy idle and unloaded reving, but its fine when driving. its not over fueling, and i havnt had the chance to check the plugs, although if it was plugs wouldnt it be all through the rev range be it loaded or unloaded?

please help

 

Could be a few different things mate.......Leads,Cap,Rotor,cps gap,etc,etc..

Cossies do have a habit of lumpy tickover,Coilpack conversion cures it properly though..

 

Well it was fine until i took it out for a little play. then after getting back into town it just sounded like it was on 3 ( but it wasnt ) and lumpy as hell

 

upski