Help, Mot failure, High emmisions

[parrot]

Bear in mind that the emissions control for a JDM spec AE86 consists of:

EFI plus oxygen sensor plus three way catalyst (i.e. catalytic convertor) which I don't think UK cars had, and may not have been fitted to yours along the way.

In a nutshell, fix any vacuum and exhaust leaks, ascertain if you have an oxygen sensor fitted, check if you have a catalytic convertor fitted.

Just because they are fitted, doesn't necessarily mean the oxy sensor or cat con are still actually functioning as intended. Also, just because the oxy sensor is in place, doesn't ensure it is connected to the ECU, although it is only one wire from the sensor to the ECU pinout and simple to check with a multimeter.

Not sure what the emissions standard was for an AE86 in the UK back then, but would guess it was EFI and VAF sensor only, so emissions may have been less strict than Jap market.