can any one help have a 1.8gti r reg with a tick over prob was told it was idle valve so had that changed which helped for a while.now when car is cold it ticks over at 1000rpm when it reaches normal temp rpm rises to 1500 when you drive car take foot of the throttle and car drives itself for a while and goes back to normal tick over 15oo rpm i have been told it could be a sensor so replaced
air temp sensor
temperature sensor
idle control valve
maf
throttle position sensor
im now at my wits end and may end up scrapping car as it has already cost me a small fortune and this is my last plea for help please help many thanks