Originally Posted by Dirty in all
Well what is happening when you desmog is you are changing the mixture and the ECU doesnt know it or adjust for it. Idle is an air screw. When you plug up all the leaks you need to add air again via the idle screw. Not much more to say about it. I guess not obvious to some people but it has been covered. Maybe not in so many words... or less.
Is the solenoid valve open only at idle or other throttle settings as well?