driving home last night my car appeared to be losing power and I thought the exhaust was blowing, today I've been the garage who said the exhaust is fine but he engine is a bit noisy and isn't pulling too well. It does still sound like a blowing exhaust to me. I've heard mention of a EGR valve on here but have no idea what that is. Is this a serious problem or easy fix, there's no smoking or any other problems showing. I f anyone can help with your thoughts I'd very much appreciate it.