Recently my RR has developed an uneven tickover that ranges from 500- 850 rpm after the throttle pedal is depressed then released. But it only does this three times then it will be fine. Has anyone experience of this on a S/C? I have researched a little and it would appear to point towards an air leak or dirty injectors. This has been recommended for cleaning the injectors: BG 44K Power Enhancer Cleaner. Any thoughts on this greatly appreciated.