mrbiz

Got my MOT comming up in a few days, i have a full s/s exhaust from turbo back, I have herd that if you take the car out for a good blast for a few miles get everything nice and hot then test the emissions it can pass. Is this true or just a myth?
I have a sti v3 standard center cat and back box will i need to fit this to get through the test

batmanwrx

iTrader: (1)

i just had mine done all cars from aug 92 require a cat no amount of heating your engine will help you get a cat or get a scooby friendly mot tester

myblackwrx

iTrader: (1)

Imports only have 1 cat (downpipe) ,centre section is a resonator.
Early (pre July or Sept 95) imports can get away with no cats.
Yours won't.
All UK cars from Aug?92 need a cat.

scoobyricht

iTrader: (4)

it will pass when hot with a center cat, make sure the one you have is a cat and not a resonator as mentioned. You can tell by looking down the end with the buldge, it will have a fine square meshy type style.

Rich

EOEUMC

iTrader: (5)

he garage I took mine too for the last 2 years passed my 93 WRX import with no cat/s. BUt the second pass was only because I had my previous emissions sheet stapled to my mot sheet! I was told it should of failed but they were confused They said it needed a cat for the next mot or it will fail! Its due in March and I am thinking of taking it elsewhere to see what they do

myblackwrx

iTrader: (1)

I've had mine decatted (93wrx) and has never failed because the garages i've used give it a non cat test as they can't find an exact match on the database (garages were 1: where i bought it from and 2: the last one was done at a Nationwide Autocentre ,the guy who did owns an impreza as well but actually showed me why he tests it as a non cat test).

Glowplug

iTrader: (8)

Pre 95 imports do not require cats mate. Its on VOSA web site if you need it in writing
This may help clarify http://www.vosa.gov.uk/vosacorp/repo...01992-2002.pdf

Underworld

drop a fiver in his pocket...


urmm did i say something??

EOEUMC

iTrader: (5)

That's great but has it changed between August 2003 and now?

myblackwrx. Mine was tested with the no cat test in the first place and it was fine, but it was also done by a tester who was a sound chap so that's probably why it went through ok lol

GC8

Its not changed for pre-August 1995 cars, no. If they are difficult insist that they call the VOSA helpline.

mrbiz

Thanks for the info folks, i will pop into my local garage tomorrow that will be testing the car and see what they say about the VOSA no cat test

EOEUMC

iTrader: (5)

Post up how you got on

turbo200chris

what about if you have a (oem) downpipe cat and a straight through stainless system off the downpipe, like a cat bk on a NA car? on a 97 v4 uk turbo?

joz8968

iTrader: (13)

So long as you've got at least one cat on your Classic; the lambda sensor's cycling between 0.2 and 0.9V fine; plus plugs and coilpacks are all in good order, then it should get through.

If it doesn't, then it'll invariably fail on the 2nd Fast Idle Test on too high CO2 emissons - but, frustratingly, it'll probably be close to the pass target, anyway . If this is the case, then take the car for an 'Italian drive' i.e. a good thrashing for about 10-20mins using loads of boost. This almost 'ignites' the cat and causes the CO2 content to diminish almost completely, giving you a fantastically low CO2 reading... therefore a big, fat PASS!

turbo200chris

oh rite, ill bare that in mind! lol cheers for the help!!

joz8968

iTrader: (13)

Yes. Every bloke needs a little *****