Honda CR-V - 2004 - High RPM not returning to Idol RPM ????

Honda CR-V SE Sport - 2.0ltr - 2004 - Manual.

When i start the car up, the idol is current, slightly over 1,000rpm when cold, after it has warmed up, this then becomes about 800rpm.

When the car is warmed up and i am driving it, this is when the problem arrises.

Ok, lets say for Example: i'm driving down the road at 30mph in 3rd gear, when i depress the clucth to change gear, the revs / rpm does not drop down back to idol rpm. If you depress the clucth and put into netral and coast down the road, the rpm should drop back to idol speed. Well it doesnt. The idol will drop to about 1,500rpm and sit there, after about 3 - 5 seconds it will then drop to idol rpm.

Another factor i found with this problem, again Example: if i'm travelling at 40mph in forth gear and release my foot off the throttle, the car's rev's should drop down slowly hence no throttle. Well, when i take my foot off the accelorator pedal, the car will continue at that rpm and speed for again about 3-5 seconds before the rpm begins to drop.

In summary, what i am trying to say is. There is a slight delay from when you release the throttle and or depress the clucth untill the rpm drops back down to idol rpm.

This can be quite dangrous, as i was going down some country back roads, relesaed my foot of the throttle to slow down to corner but the car continued at the same speed, needing the brakes to slow down.

I would very much appriciate it, if anyone has had this problem, knows of it or has any advice.