Hi everyone A little problem here I hope you can help with: My 2003 1.4 litre Ibiza has developed a couple of issues over the past year - I'm not sure when they started happening. Firstly, the engine sounds rough and idles fast (1100rpm) when starting from COLD only. The revs gradually drop over the next 5 minutes until they settle at a happy (and smooth sounding) 600rpm. Secondly, the engine seems to sputter (crackling sound) when accelerating, and will sometimes hesitate - this is only really noticable when using 95 RON fuel. If I use premium, it's not bad. The spark plugs have been replaced and the throttle body has been thoroughly cleaned. I would be grateful for any informed suggestions on this!