b16 in my 91 civic standard..i had to adjust the fast idle control valve by screwing it back in and ever since i did that the motor will rev up about 500 rpms when i put the clutch in to shift to the next gear (and i'm totally off the gas). I lost the little metal cover over the Fast Idle Control Valve...would that cause this problem? anyone have an extra b16 intake manifold?

 

it happens to me too. i have a ZC. does it happen all the time you put in clutch?

 

if i've been off the gas for about 3 seconds, it won't rev up...but i don't want to wait 3 seconds every time i shift..

it has something to do with the pressure in the manifold....could i need a new throttle body gasdet? i took off the t-body to clean it once.

 

yeah when i get into the higher rpms it does it to me, i thought it was kinda weird when im shifting and im already in the next gear and my rpms are still as high as they were in the previous gear. but they do go down