Hi there, just got an Astra 1.6 16v SXi couple of weeks ago ( 2001 ). Have noticed that it seemed to run fine but has started to run a bit lumpy and cuts out at junctions when i've been on the go for a bit. I thought it could be the Air Flow Sensor but there doesn't seem to be one fitted. ( I think it's a small air temperature sensor in it's place ). I've cleaned the throttle body as shown on this website. Any ideas??? Dale.