Emissions MOT failed with Ragazzon and induction
My car has just failed its MOT on emissions aswell as a number of other things. I have a Ragazzon exhaust on the back, which is straight through removing the last 2 silencers. Then there is the standard transverse silencer before that, and from there to the engine is a stainless steel exhaust with new CAT up to the front pipe. Also an induction kit.
Have reviewed other threads about the Ragazzon effecting emissions and it appears it doesnt.
Could it be the CAT (which was made with the custom exhaust) or the induction kit causing it to fail? (the sensors are all still present with the induction kit fitted)
Or could it ba a sensor fault? The CO results were:
Fast idle - 7.972 (limit 0.3)
2nd fast idle - 6.973 (limit 0.3)
Natural idle - 8.140 (limit 0.5)
How would I check if a sensor is working without buying a new one and fitting it? I see a lamda sensor alone sells for between £30 and £40.
Any help would be greatly appreciated.