kinder

Well the car failed its mot today due to the very high emissions but still got complement from them on the condition of the car
they tried twice to get it through and both time it was way to high it came out at
1.50 the 1st time and 1.46 the second and they are ment to be 0.30
the lamda was also out was 0.965 and should be between 0.97 and 1.03

so my question is, is the lamda sensor knackerd? and if i put a sports cat on it will it go through as i only have the standard downpipe with cat in and its dead, if i put a sports cat on instead will it go trought or will i need a center cat aswell?

all help would be great as i now have to take the car off the road until its done so i want to get ordering the parts

P4UL

iTrader: (1)

Lamda does not seem that far from the lower value replaicing this and the cat with a sports cat I would have thought would pass an MOT

TonyBurns

iTrader: (3)

So your standard cat is dead and you wonder why you have high emissions?
Now any idea on what model/year your car is??

Tony

kinder

the cars is a turbo 2000 my00 with a fmic on it and a bigger intake pipe and 2.5 inch exhaust bare that its completely standard if i put a sports cat on it aswell do you think ill need a remap too to get it trought the mot aswell ?

Alan Jeffery

Check that the lambda sensor is working properly first.
The actual mixture level is indicated by the figure of 0.965 which is too rich. changing the cat won't fix that. Ask somebody competent to check that the lambda sensor is cycling.

kinder

ill get that checked do you think it need mapping then as its not been done?

stedee

iTrader: (4)

probably sounds like the lambda is trying to make the car run rich which would give high hc readings, as alan has said it needs to cycle between 97 and 103 so many times a second