1996 honda civic ex problem! help please

Question

my 1996 Honda civic ex has a very low idle, when its cold in the morning, its fine, it holds study at about 1k then when i start driving around for a bit, it gets wormed up and the needle rests right on the lowest point it can go, i would say that it idles around 100 rpm or so... any help would be appreciated. btw, its good when im driving it, because im giving it gas, but at stop lights... boom, right back to 100 rpm.......

Answer 1

check yoru IAC valve sensor and check for a clogged throttle body

Answer 2

Change the air filter and your PVC.  

Clean out the carbon build-up in your IAC valve screen and the port hole inside your throttle opening with carburetor cleaner spray.

The port hole in your throttle opening can be accessed by removing your air intake pipe.  The hole is above the side on the front throttle opening before the throttle plates/flaps.

Against your throttle housing at the back is your IAC valve.  It is held against the throttle housing with 2 bolts.  Remove the bolts and spray carburetor cleaner at the screen if you see carbon deposit blocking the air flow.

Good luck!

Answer 3

change the air filter

Answer 4

Your Idle Air control (IAC) is not working correctly.  When the engine is cold it is running rich so that is why the idle is higher.

Good Luck...