Hi - Had the Exhaust Gas Valve Regulator replaced in my 2000 1.6 8v Astra about 18 months ago. Only done about 4000 miles since it was replaced. Engine is now showing the same symptoms as it did before EGRV was replaced ie jerky and cutting out at low revs. This time, I've noticed that the exhaust has started blowing a tiny amount, not sure where from yet, it is only just noticeable. Would the exhaust starting to blow affect the EGRV? If I replace the exhaust should this resolve the prob or should I just bite the bullet and get a diagnostics check? Thanks, Trev