I have purchased second hand 2000 Honda civic (5 door, heatch back).
When I start my car first time a day, it idles around 1200 rpm. As I start driving, it increased to 1500-1800 rpm. After around 5-10 minutes engine warms up (see on the on cluster panel) the idle doesn't go down to 800 rpm and stays around 1500-2000 rpm.
So I have to stop the engine and start engine again then the idle
goes to 800 rpm.
I had it scanned to a local garage and they say there is no fault code coming up, so it might be problem with a rotary idle air control valve.
But as per my experience & understanding of driving car, when you start a car first time after the engine is cold it will revs high but after engine will warm up it should be settled it-self. With my car it is not happening but when I switched off /on engine when the car is already warm up then the idle speed works ok.
Can you put some lights on this and advise what could be problem.
Friday, November 9th, 2012 AT 10:26 AM