How to Reduce Carbon Emissions to Pass the NCT in Ireland.
The National Car Test (Irish: An tSeirbhís Náisiúnta Tástála Carranna; abbreviated NCT) is a roadworthiness test, which all cars in Ireland must undergo.
What to Do if You Have Failed on Emissions? If you failed the NCT Emissions test you should buy a 1 litre bottle of Dipetane. Drive your car for 1 to 2 days and then take a re-test. Most Motorists should pass on the 2nd attempt.