Emissions Fail again :(
 

Hi all, I know there's been a lot of posts about emissions, so sorry for the repeat.

I had my WRX MOTed and it failed on emissions:

Fast Idle Test
CO- 1.02% vol (fail)
HC- 51ppm (pass)
Lambda- 0.988 (pass)

2nd Fast Idle Test
CO- 0.60% vol (fail)
HC- 523ppm (fail)
Lambda- 1.365 (fail)

Before this test, I had an error code- P1312 bank 1. After the test, I replaced the lambda sensor (but it was from eBay for £50 and I had to cut the wires to fit it). I also had the engine Terracleaned. I just had it re-tested and it failed again, with the same-ish results!!

The car has been modified- it has an adjustable actuator, a Cosworth panel filter, has been retuned to 270bhp, a 3" Cobra 200 cell sports cat, a 3" mid section and a Nur spec back box.

Any advice to get me through the MOT would be great, please. Thank you very much.

20 quid in the ashtray

I wish didn't work

all so runs a bit rough /lumpy

Are all the exhaust joints done up tight

yes as tight as they can go

Try the correct oem O2 sensor rather than a botched eBay special?

I never had to put my sti through MOT and had additions , totalled it before that , but

with xsara I have now the guy the garage put in generic lambda and spent hours getting it through emissions . I put recommended one this year and there wasn't a problem

( could all be incidental - they should last a Long time )

id also be checking out last years mot emissions

last years
fast idle
co-0.68
hc-46
lambda-1.005

2nd fast idle
co-047
hc-36
lambda-1.034

I'm running a 2007 hawkeye and had to have a new (genuine) Lambda sensor fitted this year to get it through the emissions.