My nissan x-trail, when started cold or when it has been driven a couple of hours ago, it idles rough on start up, then goes away shortly after, even when you rev it a little.
I had the throttle body cleaned and the injectors serviced and new spark plugs put in. Even with the old spark plugs it is doing the same. Before the service it idled rough, and now with the service done it still idles rough on start up. Also I'm topping up the coolant in the resevoir on a weekly basis.
What could this all mean?
Thank you for your help.