Originally Posted by BazDKH (Post 9789347)

I have a 1994 WRX Jap Import. Struggling to get through emmissions, fails on CO which is 4.8 and lambda.
My car is running a full Blitz Nur spec exhaust system (brand new) with high flow cat. It is running the lambda sensor in the hedders which i have checked and it's working fine (also replaced with new one). I was thinking of buying this lambda sensor off ebay:
http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT
But this sensor is supposed to go AFTER the cat/down pipe and having just checked my exhaust i have noticed there is only a bung directly after the turbo before the cat in the down pipe.
If i bought this sensor would it make any difference putting it where this bung is? The car has the standard wiring loom to go to this sensor also.
Cheers, Baz

Originally Posted by BazDKH (Post 9789402)

Anything after a 1993 (K onwards) needs a CAT to pass an emmissions MOT which is a 0.2 on the CO and mine's running at 4.8??

Originally Posted by b13bat (Post 9789406)

I've been here, done this and i have the t-shirt. It's an import and cannot be found on the data base. As my tester found!

Now go and read the thread i linked you to above.

Oooo look, answer yes=>yes=>no

http://i78.photobucket.com/albums/j8...missions-1.gif

Originally Posted by BazDKH (Post 9789417)

Ok if that is right they would carry out a none cat test which max limit is 3.5, so mine would still fail as its running 4.8 co.

Originally Posted by BazDKH (Post 9789417)

I work for a garage and we always MOT Jap imports on a CAT test. and we are an JAp import specialist.
??

Originally Posted by b13bat (Post 9789428)

That is because your Lambda is fudged. Replace and it will pass.



In which case, your nominated tester is in need of a refresher course.
This email reply direct from VOSA:

"Dear Mr B,

Thank you for your email enquiry dated 23rd September 2010, concerning an emissions test.

The 'In Service Emissions' booklet is a UK specification booklet. If the
vehicle is an import then this information would not be captured in this
booklet. As the vehicle in question is an imported vehicle then depending
on the age would depend on whether the vehicle would be required to go
through a non-CAT test or whether it would go through a CAT test using the
default limits.

You have stated that vehicle registration B13 BAT is a 1993 vehicle. Due
to this the vehicle would be required to go through a non-CAT test and need
to meet the following limits:

CO <= 3.5%
HC <= 1200ppm

I hope this information has assisted you with your enquiry, but if you have
any further questions please do not hesitate to contact us again.

Kind Regards

Rebecca
VOSA Contact Centre
Operations Directorate
Tel: 0300 123 9000"

Originally Posted by BazDKH (Post 9789436)

Thanks for the above help, I will have to do some more research as I have tried it with a new Lambda sensor and it makes no difference, I have checked that the sensor is working with our Diagnostic machine and it is switching as it should, and gives the correct voltage.
So now I need help on how to bring the emissions down as it is then really......

Originally Posted by b13bat (Post 9789461)

What mods do you have?
Was the cat up to temp before testing?

I run a fully decatted 3" down pipe and 3" system, my CO2 was 0.57% and HC was 127 ppm.

Which Lambda did you use to replace, new or used item, cheapo universal or a Bosch unit??
I tried a cheapo and it lasted a day, less than 100 miles!

Originally Posted by joz8968 (Post 9789481)

Need to check all 4 coilpacks' condition, is next step...

Originally Posted by BazDKH (Post 9789478)

MOT tester at work tried for ages to get it to come down but it wouldnt.

Originally Posted by b13bat (Post 9789510)

That is because he was testing the emissions in the wrong way, using fast idle.
A non-cat test is done at 'natural idle' only. There is NO way it will pass other wise.

Go to work and educate your nominated tester.;)

Originally Posted by BazDKH (Post 9789537)

He'll love that when I go back next week and tell him! He doesnt like to be told!!!

Originally Posted by BazDKH (Post 9789537)

I bet it would go through on natural idle then, I'll update you next week then.
Thanks again for your advice....

Originally Posted by nessscoob (Post 9789503)

My coil packs fcuked up on my old wrx. They were that bad that it was missing like hell on boost. When I took them off the cracks were that small they still looked fine. Replaced them all at great expense but solved the prob.