Hello, I am hoping someone here can help as I drawing a blank. I have a non turbo 2004 Diesel Berlingo, It's failing to rev above 2000, and bellowing out thick black sooty smoke. I know this is due to not enough air in the fuel mix. So far I have blanked off the egr pipe, and disconnected the exhaust but it is still blowing thick smoke and failing to rev. Any help is much appreciated. Carl