CO2 emissions

[John1.4]

i would say that's because it wasn't up to temp, a lot of the aftermarket ones have to be almost red-hot to do anything, coolant temps being lower may affect it, these TU lumps do run at about 90-95 degrees normally, do you run coolant or have you just got water in there?

ideally go for a good italian tune-up just before the Mot and get it put on the emissions tester straight away