406oc.co.uk

Just failed MOT smoke test, despite renewing engine oil, filter and air filter.
Tester tried many times with the usual brutal static acceleration, but only brought the level down to 6.2
My driving style is for ecomomy, with the rev counter rarely going past 3000, so the tester suggested giving it a good thrashing and then trying the test again, but could this bring a level 6 to under the limit of 3.0? He also suggested trying an additive, but I have heard that this is not advised for HDi. There are no warning lights up, and engine runs fine except for a little noticeable black smoke if I put my foot down. Onboard computer registers mpg between 35 and 45.

I'm not condoning action, and dont know what might result, but disabling EGR function on the BMW/Rover common rail is done a lot, and bypasses are common to get rid of the restrictive valve in the air flow too. a bypass on my 170k engine resulted in figs coming down from 1.8 to about 0.7 at successive MOTs
Try disabling it?