Well i am hoping this is the right place for the question. I have an 04 astra g its a 1.6i 8v active and keeps cutting out at roundabouts etc. Also on start up sometimes the revs drop and it also cuts out then. I have cleaned egr valve and the throttle body and want to no weather it has a stepper motor as i cant find it to clean it if it does were is it and do you guys have a picture of it. Thanks for taking the time to read guys.