morto

does any one now the right page for emmissions for vosa as iv just found out that even tho my car has a cat that becus its registed before 31 july 1995 it doesent have to have a cat and so the c/o can be as high as 3.5% not the 0.30%

andy

DazC

iTrader: (1)

Your car has to be registered earlier than 92/93 or your engine has to be earlier (and you have to be able to prove it) to qualify for the old emissions test of 3.5% CO limits.

No where in the MOT book does it state that you need to have a CAT fitted but your car will probably never pass a test without one.

morto

here it is

Exhaust Emissions - Spark Ignition –
Passenger Cars 1 August 1992 to 31 August 2002
12 Issue Date: August 2003 The MOT Inspection Manual
7.3
CAT 1
Button
Vehicle first
used between
1 August '92 and
31 July '95
Can
you find an
exact match in the
analyser database or the
In-Service Emissions
book?(2)
Carry out a CAT test
using vehicle specific
limits
Vehicle first
used between
1 August 1995 and
31 August
2002
Carry out a CAT test
using vehicle specific
limits
Carry out a non CAT
test
CO <= 3.5%
HC <= 1200ppm

this is from the vosa mot inspection manual

andy

morto

forgot to say its a import thats why it doesent need a cat it has to be registed before 31 july 1995 mine was registed march 1995 , ive got this information of the mlr and the guy mots cars thats how i found out.

andy

morto

sorry heres the link

http://www.vosa.gov.uk/vosacorp/repo...01992-2002.pdf

biscuittin

i think if you have an imported vehicle it can have a co of 3.50 %
you will have a normal cat test if it fails ( due to no cat )
you the go into default where you choose the excact vehicle , you are testing
but you can't find you're imported vechicle as you have not got an excact match for that car
so you get a default setting of 3.5 %
it's not worded like that , but that's how you dont need a cat on an imported car upto a 1998 ( i think thats the year )

morto

your right mate,, ive looked on the mot sheet and they have put a evo 4 when its a evo 3 cus they cant find the 3 but its only up to 1995, this is a good find realy

andy

morto

ok update on this , took the car in for retest with new lambda sensor on, and showed the mot guy the 3.5% rule on import cars before the date for no cats , he retested and the c/o was still to high so he used the 3.5% rule and it went thru at 1.75%
unless i had showed him the paper from vosa he would not have known, he also says that big exhausts stop the cats from doin there job , weather thats true i just dont now

just a couple of things to help peeps with lambda but this is on evo,s

If the sensor is reading a constant voltage of around 0.8v then it probably isn't faulty but is correctly reporting a rich mixture; in this case you may have a fault on another sensor or on fuel pressure etc as suggested above.

If the voltage is more like 0.2v then it may well be faulty.

and At idle the reading should fluctuate because the ECU is operating in closed loop mode and if it's showing 0.8V then the fuelling will be reduced to try and bring it back to stoichiometric and then the voltage reading will drop etc...

andy