Emissions dramas! L(92) carb+cat
Turbo Mini Forums

Right guys thought I'd post on here because I'd get a proper answer!

The misses mini has just been through its MOT today. And it failed in the emissions. Trouble is it is a standard car with pea shooter exhaust etc. Its a 92 L reg, it has a hif38 and a cat as well. Iv just fitted a new cat and wound the mixture of a little but it still fails the emissions.

Now I don't want to wind the mixture so far off it barely idles. That's just masking the problem. I understand the required emissions test surround this age/type of mini is a bit of a grey area with different people saying different things. Il post the results below.

First fast idle test

CO <=0.3% Mine was 1.53%
HC <=200ppm 61ppm
Lambda 0.95-1.09. 0.96


Second fast idle

CO 1.55%
HC 68ppm
Lambda 0.96

Natural idle test

CO <=0.75% Mine was 2.27%

Just noticed on the test sheet it's got vehicle description 1.3l auto tbi engine and catalyst equipped vehicle with close loop control.

Am I being tested under the wrong criteria?

Basically they are testing it to limits it cannot achieve. The pre cat test requires <3.5% CO which it is achieving.
Try a friendly chat with the tester first off, I believe from memory that SU carb and CAT equipped A series engines were specifically stated in the MOT testers manual for this very reason, e.g. Even when new they couldn't pass the CAT test.

Cheers Tom I found this online https://www.gov.uk/government/uploads/syste...7th_edition.pdf

Iv read through it but can't make out exactly what it's saying. Iv looked through the attached annex and it only lists the injection minis not the carb. Does this mean my tester would be required to the 3.5% CO test?

that pdf basically says your on 3.5% co unless listed in the annex. the annex specifies "vehicles fitted with advanced emission controls" i.e. not a shitty SU. :)

FWIW with your HC being so low, the engine must be in fairly good health :)

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

As Denis says. See table 1, 4th row down.

pages 164 and 167 are very relevant, 167 says if it isnt specifically mentioned in the list it gets a 3.5% test. and page 164 mentiones it as build date (check the v5 for the month)
https://www.gov.uk/government/uploads/syste...-7_vehicles.pdf

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

Thanks very much, il speak to the mot tester and see what he says.

turbo 16v k-series 11.9@118.9 :)

Denis O'Brien.

What month in 92 is it ?

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Have not clicked evos link but I think that's the same ruling that lets me run with no cat on a 1995
Mine being an import with no uk equivelant its emissions are not listed thus usually not tested

Yes i moved to the darkside

Instagram @jdm_brett

My bad looking on the log book date of first registration is 11/93

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Please check topic I wrote in frequently asked questions board on this forum.

link..


http://www.turbominis.co.uk/forums/index.php?p=vt&tid=462092

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

Thanks Robert, web surfing from a small phone screen inbetween staff training is difficult to find these things easily.