jamesst24

hi all took my st24 in for mot this morning and it failed its mot on

1. exhaust emissions carbon monoxide content at idle excessive

2. exhaust emissions carbon monoxide content after 2nd fast idle excessive

hydro and lamba passed........

please help.. i have just serviced it

jamesst24

any body

stu170

Take it for a good run and get it warm before you take it in

Roscopeco

iTrader: (1)

Mine was like that but sluggish , took both lambdas out gave them a good clean and it cured it

jamesst24

it has been quite bad on fuel recently

jamesst24

to be honest mate it drives mint and idles great

Piston Broke

CAT is in need of change, common on these, give euro car parts a phone there the best i find for these on the price

smudger068

My focus had the same outcome and it was cat and does sound like a Cat needs replacing, if it is still the genuine one fitted weigh it in a you will 20 or poss more quid back

Smudge374

I had similar on my 3.2V6 vectra, I gave it a service which you said you have done, and added an additive called clean burn by wynns I believe, took it out for a good thrashing, got the car red hot and then took it back for retest once cat was roasting hot. Sometimes I don't think they allow the cat to get up to full temp before test. I would try this first.

BM08

I very much dout this but on my civic it was failing badly on emissions a couple of years back, we did the getting it nice and warm before the test, using some additives etc but nothing worked, then we removed the crappy universal cone filter it had on, and surprise surprise it passed with flying colours, so i got a standard air box and bolted that back on, passed again this year with good figures

Cossie Sean

what are the actual readings from the MOT fail please

can you copy the A4 sheet of paper you got? much more help

jamesst24

0.59 first 1

0.49 sec 1...

its meant to be 0.29

Gazzonator

iTrader: (9)

I've got a 2.5 Ghia X and when I took that for an MOT a coupe of years back it failed similarly to yours.

I took it back out, thrashed the living daylights out of it, took it back and it passed straight away!

cossirob

Them reading are not that far out tbh id take it for a good blast give it a clear out and thake it back but id ask them to put it on there tester first otherwise if it fails again youll have to have another full mot and pay