16-03-2013, 09:06 PM
You have plugged the icv which controls the amount of air required on idle. When your off the throttle, the butterfly is closed but it still needs a bit of air which it takes through the icv. You need to get a small filter for it. About £10 for a generic one from halfords
Team Eaton
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft
1999 China Blue 306 GTi6 - Eaton Supercharged - 214.5bhp 181lbft