hi all ive got a vauxhall astra mk4..bought second hand,the eml light is on on the dash,hooked it up to the diagnostics and came back with the egr valve prob being dirty or faulty..ive been out today and bought a new egr valve(£45)..fitted it and the eml light is still on the dash.the car runs great when its being driven however when stopping at junctions or lights 8 times out of 10 it will cut out,but will restart straight away. i put new plugs in yesterday. could it be possible that the carb could be clogged up with dirt. i know that i could get the egr blanked of but i dont want to do that as im selling it next month...ant ideas..thanks.