Quote; "a device that allows air to be bled into the exhaust system"
On diesel cars, the EGR allows exhaust gases to be mixed (recirculated) with the inlet manifold air intake, therefore going back thru the engine mainly to reduce Nox I believe.
Can be good or bad depending on your outlook...
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Quote; "a device that allows air to be bled into the exhaust system"
It's actually the other way round, to reduce combustion chamber temps to that below which Nitrogen gets readily oxidised.
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I too had this problem with my 2.0 Omega and I got a second hand EGR valve from a breakers for £25.
I kept the old one and soaked it in white spirit and after 24 hours and a clean it worked OK and went back into the car when the replacement failed 30,000 miles later!
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I think www.vauxhallspares.co.uk have a sale on at the moment; usually a good source of Vx parts.
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