Give us your best shot!
#1
Scooby Regular
Thread Starter
Give us your best shot!
Ok, techies .... one for you ....
My other car, a 1995 MX5,:-
CO reading last year at idle is 0.3% (limit is 0.3%) it has been increasing each year for the past 5 years.
From 0.07% - 0.3% ..... I am sure this years MOT will see it at 0.32% or something ..... hence a fail!
Lamda reading has been 0.993V each year so thats fine
HC are well withing spec
CO reading at fast idle is a pass (but this has been increasing to!)
Would replacing the Lamda sensor cure it? Is it a new CAT thats required?
The engine runs and idles perfectly, no misfire, no hesitation, the car does 1200miles a year! (could that in itself be an issue?)
Cheers for any reliable hints and answers
Pete
My other car, a 1995 MX5,:-
CO reading last year at idle is 0.3% (limit is 0.3%) it has been increasing each year for the past 5 years.
From 0.07% - 0.3% ..... I am sure this years MOT will see it at 0.32% or something ..... hence a fail!
Lamda reading has been 0.993V each year so thats fine
HC are well withing spec
CO reading at fast idle is a pass (but this has been increasing to!)
Would replacing the Lamda sensor cure it? Is it a new CAT thats required?
The engine runs and idles perfectly, no misfire, no hesitation, the car does 1200miles a year! (could that in itself be an issue?)
Cheers for any reliable hints and answers
Pete
#2
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Join Date: Nov 2000
Location: 32 cylinders and many cats
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Hi Pete. Sounds more like the cat to me. The lambda reading would be off if the lambda sensor was dodgy. Might help giving the car a really good drive before the test to get the cat nice and warm.
#3
Scooby Regular
Thread Starter
Thanks John .... not what I wanted to hear really but thats my thoughts exactly!
Maybe a nice long hard run would just pull it through? Anyone any legal ideas?
Pete
Maybe a nice long hard run would just pull it through? Anyone any legal ideas?
Pete
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