180sx NCT Emissions??

[Drift88]

I just put my 180sx through the nct and it failed on emissions.

Its a 97 180sx Blacktop non-vvt SR20DET


High Idle Lambda: 1.09
(2,810 rpm)
Co 0.02 vol%

HC 24 ppm

Do i need a new lambda sensor guys??



cheers,
John.

[Keli]

Is your lamda reading too high?

[Drift88]

The lambda reading should be between 0.97 and 1.03....!

But mine is 1.09......!



is this high?? :huh:

[Keli]

We could do a math lesson...
but I'll just give you the answer. :)
You probably need a new lamda

*It might not seem that high but considering you only have a .06 accuracy window and your reading is a whole .06 higher than the highest reading then it's pretty high.

[Drift88]

We could do a math lesson...
but I'll just give you the answer. :)
You probably need a new lamda

*It might not seem that high but considering you only have a .06 accuracy window and your reading is a whole .06 higher than the highest reading then it's pretty high.


I always hated maths!!! :p

yeah your right...it makes sense! :D



thanks keli :afro:

[trevormcae86]

lambda only reading d air mixture in exhaust , just because its outside readings doesnt necceserily mean a lambda , easiest thing first is check for leak in exhaust or blow out somewhere , , your lambda is running too lean at minute

[speedy200sx]

as said check for leaks first, exhaust could be drawing in air from somewhere
after the lambda, if its all sealed tight bang a lamba sensor in, its a bit to high for it to be the cat-convertor:)

[markos]

sounds lik exhaust blowing somewhere to me

[Drift88]

sound......thanks for the advice lads!! :D