Hi, my name is Buddy and I drive a 1992 Honda Civic DX 5 speed. My engine is idling around 2,000 - 3,000 rpm and that is more than the manufacture level. I checked the computer and it is not giving any codes. I changed the PCV valve, removed the intake hose and cleaned the throttle plate with gum-out carburetor
spray and still i have the same problem. Can someone help me with my problem??? thanks a lot...Buddy.

 

check the iacv. timmimg etc..

 

Sounds like a vacuum leak. With the car running spray carb cleaner around the vacuum hoses and ports. The engine speed will change when you spray the leaking component/hose.