Got a corsa with the 1.2 XE lump in it. Problem is when i lift off the gas the rpm goes right down to like 300-400 rpm, car gives a little shudder like its about to stall for a sec and then it rises back up to normal idle. Whats that all about? it isnt normal is it? I know the ICV is a BIG problem on these little lumps, does anyone think its that or perhaps the Throttle position sensor, or airflow meter? Its not a BIG problem and ive had it quite a while, its just beginning to annoy me now. Its completely standard engine, did have a pipercross induction kit but sold it as it did nothing but make a little noise! Just a stainless back box but that aint going to effect much is it. Any help much appreciated - Tom.