revs dropping down and back up

[chris hawker]

when stood stationary the revs drop and rise back up to normal and it keeps doin this until i drive away. but the revs done change on the clocks its just the engine tone what could it be? got a 1.2

 

[Matt]

Hi,

I had this a few weeks back on my 1.6. I replaced the HT leads and Spark plugs and also filled her to the brim with Shell (top) petrol, instead of Sainsbury's own. Could've been the Sainsbury's fuel, as I've not used it since. More likely the service though.

 

[Anonymous]

Idle actuator valve, nothing to do with leads or petrol.

 

[chris hawker]

sounds expensive maybe it need a good service oil change and the rest been neglected for some time