lumpy idle..no fault codes....what things can i check?

[jarvis**turbo**]

cars has had lumpy idle for some time now.its starting to get a little bit worse now.i was guna try cleaning the maf sensor and also maybey change the temperature coolant sensor as this aperantly doesnt always show fault code. any other ideas people?iv had the throttle cleaned and reset aswell.didnt help.

 

[madvw]

just check the other usual stuff really, maf and lambdas.

 

[james0808]

Have you checked for air leaks?

 

[HTC]

I concur, vacuum leaks are always a good source of lump idles.