Back Room Forum - Honest John

My instinct is that they are a ridiculous device putting horrible exhaust gases and small nasty particulates back into my engine. I have recently done an up to date mpg check and found it has dropped from 39 / 40 mpg down to 33 mpg, though the car now has a roof rack. I would have thought the roof rack would only have a small impact on the mpg: maybe 2 or 3 mpg. Due to a medical condition I have had to reduce my mileage to comfortable lengths of only a couple of miles : 2 miles there and a couple of miles back. I do make a once a week journey of a total of 14 miles there and back. So what I'm trying to describe is the fact that I'm now only making short journeys which again will reduce my mpg quite sharply I would guess. My question is, will removing the EGR valve improve my mpg. An EGR valve is another dubious component legislated into car engines both petrol and diesel to reduce emissions, in this case crankcase emissions. They were actually the first of many expensive emissions devices fitted to diesel engines, coming with the first direct injected VAG TDI engine: the TDI90 in the Golf and Audi 80. They have been followed by oxidising catalytic converters, DPFs and... Source: www.honestjohn.co.uk