Mate has just bought a rs, but when its ticking over it runs lumpy, like its on 3 cylinders, but it aint, its ok once you start reving it just when its sitting idleing.

What first bits your look at? Check at few bits but not sure where to go next, thing it needs a good service!

 

has it got a uprated cam?

 

i had this............it was a head gasket, used to run a litttle warm, no oil in water or water in oil.....but just had a nasty tickover...!

neil

 

Nah got standard cam, gonna do a compession test on it, if its still like it after service!

 

my 3i was doing this,on tickover it was on 3,pull away and it was fine. turned out it was a duff spark plug on number 4!! new plug sorted it.