If you want to pass the diesel NCT, drive like hell in the wrong gear
We had the car tested privately a few days later and it gave an 0.50, 0.45 and 0.35 reading. It was then returned to the test centre where it passed with a 0.25 level.
I would like to give some advice to all Peugeot HDI engine car owners who are about to do the NCT test. Apparently the HDI engine does not like slow driving. We were advised by the NCT centre not to drive at 30kph in fifth gear (if that’s possible) as the soot accumulates but does not clear the exhaust. Apparently the same applies to petrol cars. The NCT people (who were, in fact, doing their best) made the following amazing recommendations:
