Mazda Rotary Club

General => General Technical => Topic started by: matthewbellamy on March 29, 2012, 09:53:58 PM

Title: DeCat Legality
Post by: matthewbellamy on March 29, 2012, 09:53:58 PM
Hi Guys
 
Got MOT booked soon, just wanted to clear something up. My FD is a 1992 which makes it roughly 20 years old does that mean that the MOT will pass with a decat or would i have to put my old cat back on?
 
Thanks as always :)
Title: DeCat Legality
Post by: m1tch on March 29, 2012, 10:08:41 PM
Cutoff for emissions for UK cars is 91, although jap imports are ok for a bit longer, its why I chose an FC, with air pump = 0.18% CO, without airpump or any emissions stuff = 2.3%ish so still a pass for me.
Title: DeCat Legality
Post by: matthewbellamy on March 29, 2012, 11:50:36 PM
Thanks M1tch :)
Title: DeCat Legality
Post by: Brett on March 30, 2012, 11:11:22 AM
If it\'s J reg or earlier it should have a CAT really...
Title: DeCat Legality
Post by: bimbleuk on March 30, 2012, 11:59:31 AM
I may be wrong but I don\'t think there\'s a law that a cat has to be fitted but it must pass the emmisions for the cars registration etc.
 
Just not vey likely to pass the emmisions test designed for when a cat is fitted.
 
http://www.motester.co.uk/CarOwnersGuidetoTheMOT/MOTQA.aspx
Title: DeCat Legality
Post by: probedb on March 30, 2012, 05:03:34 PM
Quote from: Brett;818019If it\'s J reg or earlier it should have a CAT really...

Earlier? I think you mean later.

But either way it\'s somewhere around 1995 for imports.
Title: DeCat Legality
Post by: wolfie1 on March 31, 2012, 04:32:51 PM
your co limit on your fd is 3.5% if its an import
Title: DeCat Legality
Post by: Ricco_04 on March 31, 2012, 06:06:14 PM
All UK Spec FD\'s must have a cat fitted, weather it would pass or not without one. Imports I thought where ok up to August 1995 and after that needed a cat fitted.
Title: DeCat Legality
Post by: matthewbellamy on March 31, 2012, 07:25:47 PM
Yep guys its an import 1992 :)
Title: DeCat Legality
Post by: Brett on March 31, 2012, 08:26:24 PM
Yeah - I managed to type the opposite :-p
Title: DeCat Legality
Post by: frank20bcosmo on March 31, 2012, 08:47:34 PM
I was told by my MOT station if it is registered before 1st Sept 92 it does not need an emissions test so will not matter if no cat fitted ,, however if it is after 1/9/92 it will need emissions test so you will need your cat on to pass
Title: DeCat Legality
Post by: matthewbellamy on March 31, 2012, 09:00:49 PM
My documents state imported in 2003 and registered 1992 but no exact date.. this is awkward..
Title: DeCat Legality
Post by: adib on March 31, 2012, 09:27:49 PM
they put your number plate in to the machine and that tells them if it should be a cat or non cat setting, thats what a tester told me
Title: DeCat Legality
Post by: m1tch on April 01, 2012, 07:31:35 AM
Quote from: frank20bcosmo;818182I was told by my MOT station if it is registered before 1st Sept 92 it does not need an emissions test so will not matter if no cat fitted ,, however if it is after 1/9/92 it will need emissions test so you will need your cat on to pass

It still needs an emission test as the car isn\'t older than 1974, it just needs a no cat test vs a cat test, so it would be allowed 3.5% rather than 0.5% lol rather handy on a tuned rotary :rolleyes:
Title: DeCat Legality
Post by: Ricco_04 on April 01, 2012, 06:06:46 PM
Quote from: matthewbellamy;818183My documents state imported in 2003 and registered 1992 but no exact date.. this is awkward..

Your car is an import from 1992 so you should be a non cat test of 3.5% co and 1200Hc\'s and you do not legally need to have a cat fitted.
Title: DeCat Legality
Post by: matthewbellamy on April 06, 2012, 10:01:35 PM
Thanks Ricco - any more news about what you are selling possibly wink wink..
Title: DeCat Legality
Post by: Adam on April 08, 2012, 10:45:32 PM
Back in the day when I had my 1995 fd got it through an mot with no cat due to there being some law cause it\'s an import it didn\'t need one.  The mot station told me it needed one but told them to ring their head office and I was right :) so happy days

Cheers
Adam
Title: DeCat Legality
Post by: DJ Tommo on April 09, 2012, 11:00:42 AM
My car has a straight through system fitted with no cat or silencers and it passed. I see no reason why yours wont. Talk to Sicknote (dave), he does MOT\'s. Dont know how local he is for you tho...
Title: DeCat Legality
Post by: neoroony on April 25, 2012, 06:40:04 PM
Simple way to check the figure you need to hit is by using the directgov site for vehicle enquires

I have a \'92 import and the report back states my CO2 emissions are zero so no testing for me.

I also checked a random \'06 911 turbo to make sure this tied up and it states 302g/km

https://www.taxdisc.direct.gov.uk/EvlPortalApp/app/home/intro?skin=directgov
Title: DeCat Legality
Post by: gibby250983 on May 01, 2012, 06:48:50 PM
Quote from: neoroony;820977Simple way to check the figure you need to hit is by using the directgov site for vehicle enquires

I have a \'92 import and the report back states my CO2 emissions are zero so no testing for me.

I also checked a random \'06 911 turbo to make sure this tied up and it states 302g/km

https://www.taxdisc.direct.gov.uk/EvlPortalApp/app/home/intro?skin=directgov


clicked the link and mine came back as not available..... so dose mine need a emissions test?

94\' import!!!
Title: DeCat Legality
Post by: samoht on May 02, 2012, 07:58:16 PM
Quote from: gibby250983;821815clicked the link and mine came back as not available..... so dose mine need a emissions test?

94\' import!!!

Your car, as a pre-Aug 1995 import, qualifies for the old emissions test of 3.5% CO.  If the engine is running properly you should pass this WITHOUT needing a cat fitted.  If you have over 3.5%, your engine is running rich and you need the fueling adjusted.

Incidentally, CO (Carbon Monoxide) and CO2 (Carbon Dioxide) are totally separate things.

CO2 is produced by normal combustion of fossil fuels in air (and also when you breathe out).  The amount produced is basically a measure of fuel economy.  For cars after about 2001 (RX-8s), CO2 emissions are measured when each new car *model* is launched, and the annual road tax (and company car tax) are based upon the CO2 emissions.  CO2 is *not* measured at MOT.  For older cars (RX-7s), CO2 is not rated and is irrelevant - road tax depends on registered engine capacity only.
The link provided allows you to check the rated CO2 emissions for road tax purposes, and is irrelevant to MOT and irrelevant to RX-7s.

CO is produced when the fuel doesn\'t burn completely.  CO is poisonous to humans if there\'s too much of it.  A properly tuned engine will produce a small amount of CO - running rich will produce a lot more.  A catalytic converter changes the CO into CO2, which is non-toxic.  CO levels are measured at MOT, the standard required depends on the age of the car.  As stated, UK cars after Jan 92, and imports after Aug 95, must meet a much lower CO limit which can generally only be achieved with a cat fitted.  Older cars have a higher limit, which can be achieved without a cat, as long as the engine is not running too rich.
Title: DeCat Legality
Post by: m1tch on May 02, 2012, 08:03:37 PM
FC3S - no cat, no air pump = 2.37% CO
FC3S - no cat, air pump = 0.18% CO
Title: DeCat Legality
Post by: gibby250983 on May 08, 2012, 11:15:49 AM
I\'m down at the garage now and he is saying that the emissions test is a cat test but mine is a 94 import! Not sure how to go about this!!
Title: DeCat Legality
Post by: gibby250983 on May 08, 2012, 02:42:38 PM
Never mind she has passed!! Magic!!
Title: DeCat Legality
Post by: mpk490p on May 09, 2012, 10:08:02 AM
visual test for me......is there an exhaust...tick :)
got to love old skool
Title: DeCat Legality
Post by: matthewbellamy on May 09, 2012, 10:47:32 AM
Hey gibby was yours a decat and was it mapped by an apexi?
Title: DeCat Legality
Post by: gibby250983 on May 09, 2012, 02:08:26 PM
No de-cat or an apexi FC commander! Just lowered the idle to about 700-900 and sailed right thru!! Over the moon with it!!