Here are the symptoms:\nWhen the clutch is depressed, revs surge to 1500 rpm and then drop\nback to around 1000 to 1200 rpm.\nWith the engine hot and idling the revs vary between 1000 and 1200\nrpm over a 3 second period i.e. in 3 secs, revs go from 1000 to 1200\nthen in the next 3 seconds they fall back to 1000 again.\nI have checked the following :-\n1) there is slack in the throttle cable\n2) The throttle - stop screw just touches the plate; if I turn it out\nany further then it is the throttle flap that stops the throttle\nmechanism rather than this screw. According to my information, this is\nnow adjusted as it should be.\n3) Resistance measured on the TPS (throttle position sensor), 990 ohms\nto 3000 ohms in smooth progression. The manual says the range should\nbe 700 ohms to 3000 ohms but I dont know if this slight difference is\nthe problem. I'd have thought the only problem you'd get with a TPS is\nit not making contact at all due to wear; hard to see how resistance\nat the low end could increase unless its not going back far enough.\nI do not have an idle switch on this car.\n\nHas anyone had these symptoms and found out what the answer is?