Originally Posted by richm
if the idle speed is 700rpm with the valve disconnected, then the base idle setting is too low - you need to raise it to 850-900rpm (warm engine) by adjusting the air bypass screw under the throttle body, before you do anything else
will have a go at this today
wont touch the CO screw as i dont have an analyser here, but will try and raise the base idle a little.
would like to know whats causing the iscv to be permanently open though???