decvalts Posted January 4, 2022 Report Share Posted January 4, 2022 EGR is currently "blanked" (well - the screw in the vaccuum hose method) - Should I 'unblank' it before an MOT? (Either for reasons of meeting the emissions criteria, or any other rules about messing with emissions devices (although I think that only applies to DPFs?). It's an SDI, do they still just check smoke values on diesel MOTs? Quote Link to comment Share on other sites More sharing options...
mk2 Posted January 4, 2022 Report Share Posted January 4, 2022 Yup, you'll be good. You will actually get a better (lower smoke) number with EGR deactivated. Only thing that goes up is NOX which is only measurable during loaded driving (think vdub diesel scandal). Limit is 2.5 units, but see if you can below 0.5 (which is really clean). Quote Link to comment Share on other sites More sharing options...
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