Quote:
Originally Posted by COcyclist
Big Dave, If I am reading this correctly, EGR HELPS with mpg in some diesels but hurts the VW TDI? Can you add links to your sources please? Some folks claim EGR hurts mileage, some say no difference, and some say it helps diesel mpg.
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Pulling the EGR cable throws a code on some vehicles. This puts them into a limp mode which adjusts injection timing, messes with the VGT boost tables etc. Less EGR is better for economy but it may be offset by the computer depending on the vehicle.