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cardblower posted a topic in Ford Focus ClubHi All, I have a 2001 Ford Focus 1.8 Zetec (petrol). I'm new to this forum and have searched a great deal but only seem to turn up topics that refer to idle issues. The idle is (usually) pretty stable at around 750-800, so I've not got an issue with that. Also, I've checked the fault codes and there are none. But, the car is using a lot of fuel and if you rev the engine (whether hot or cold) it revs well and then in a 5 to 6 second cycle will drop the revs by around 15% and sounds like its being staved, then revert to normal for 5 to 6 seconds, then then start this cycle again.... There does seem to be an audible "click" when this happens, so it's very odd. The only thing that's been changed is a new clutch, I dont know whether it had the fault before as the car was my parents and I didn't drive it before the clutch change. they hadn't noticed the fault, but then they didn't drive it much - its only done 36K miles. Would anybody have any ideas for this please, as I'm about to take it to a garage to get them to investigate, I just wanted to save some money and time if the knowledgeable folks on this forum had some ideas/pointers. many thanks in advance. Andy.