Erratic idling..

[bod]

Went to work this morning and on way car stalled at junction,then when got to work car idle really low then stuttering then cut out.every time i re started car,erratic idle then slowly cut out and stalled.couldnt find anything wrong,checked AFM meter for loose connections r owt,nothing.any way found breather pipe on drivers side going into wing with a green plug in it,and a smallsnail like electrical plug on it, nothing wrong with it at all,but when i unplugged it idle settled loverly and car ran fine.dont want to run like this want to find problem. as when i re plugged breather back into snail electrical connection car started stuttering and stalled again... am thinking dodgy AFM meter but wondered if any of u guys and girls had similar idle/afm meter probs and wot u did to fix. theres no warning lights or owt coming up.?????

[chrismk4gsi]

this happened to me whilst the car was under warranty, they replaced the boost pressure sensor or summat then all was fine.