hi all,i have a couple of enquiries for you knowledgeable people out there!! i dont think the egr pump/fan on the right hand side of the engine is working,i have trouble very occasionally i get a juddering/lack of power only very occasionally.plugs and leads have been changed and coil packs tested ok.i cannot feel or hear the pump operating at all compered to say a vauxhall one which sounds like a small hoover under the bonnet on start up.also i have noticed that in the small relay box on the right inner wing area there is a 30 amp fuse that keeps blowing. i have replaced it 3 times,every time i check it its ok,then the next minute its popped!its a 1997 2000cc.its my first galaxy and i have no handbook etc to guide me.oh 1 other thing is it timing chain or belt ?when is change reccomended ? thanks peeps!RICH