LIDDO

Yipppeeeeee! My MY99 UK passed its MOT with flying colours yesterday, and Ive not long had my Decat Downpipe fiited. All's Ive got is a resonated centre section. The guy said its the cleanest Impreza underneath he's ever seen so Im WELL made up. So, all you guys and gals worried about decating, DONT BE

ozzy

Have you had the car remapped?

I tried a back-to-back test last year with and without a CAT and it was nowhere near passing. Yours is the first MY99 I've heard passing without one.

LIDDO

Nope, not re-mapped. Green cotton panel filter, and dump valve only And I didnt need to pay AHEM! any extra either

pslewis

Fact 1 - It cannot possibly pass, legally, without any CAT in place!!

That is a fact of life ..................... or, clearly, EVERYONE would be de-catting their cars and the Catalytic Convertor manufacturers would go out of business!

So, congrats. on passing, but please don't think the emissions are legal - they aren't!

Pete

LIDDO

I was told that after the Scoobs warm up, they pass emissions quite easily. If I'm wrong, then I've been told wrong, but hey, who gives a f**k, I've got an MOT Certificate for 12 months

TonyFlow

Emissions could possibly be legal, BUT if the car is made after (iirc) 1993, it MUST have a cat in place - regardless of whether it passes emissions. I just bung the downpipe back on come MOT time, even then it only just scrapes through !

ALi-B

iTrader: (1)

Do you still have the up-pipe cat though? - if you do it will still pass

MOT impection does incorpertae a visual inspection of the condition of exhaust system - including cats...but seeing both up-pipe and down pipe cats are covered by both heatshields and the undertray - visual inspection to see if they actually exist is "difficult" And the centre section cat doesn't have to exist (PPP etc. ). It's down to the Tester to know what "should" be there - more often than not they do not know where the cats or what cats should be fitted in the exhaust (or could esily forget for a few drinks)

It is possible to get certain cars through - zetecs running 100% spot on (rare ) will pass easily without cats, as do a few other engines. Scoobs passing without cats (not pre '96 import ) is very very rare - I can manage to pass the fast speed idle, but it all goes to pot at natural idle - closest I've been is 0.5%CO good without cats...but not good enough for an MOT.

TonyFlow

My MY98 used to go through with no cats, when VERY warm! My 5 Type R doesnt stand a hope in hell (and takes enough buggering about with to pass with the downpipe cat in!) AFAIK, a MY99 will not have an up-pipe cat!

LIDDO

Nope, it didnt have an up-pipe cat, just a downpipe cat. As I said the, its still got the Magnex resonated centre section on, so whether that made a little difference, i dont know, but, Im STILL made up

Fat Boy

Probably running lean - passed your MOT, but it'll go bang soon instead...
HTH

flat4_ire

itl go bang soon? what kinda ******** are you?? what would you know? the mans cars passed with no cats, fair play! legal or not

bzz

I have a MY00 UK turbo, with a Magnex decat downpipe and a Scorpion b/box, but it still has the centre section cat intact. Mine passed the MOT ok, and when I asked him about the decat, he said that as long as the centre cat is still in place, the car is legal. Won't get so much out of her as I would with a full decat, but at least it saves the hassle of changing the pipes every time, and she still goes very well!!

STi wanna Subaru

iTrader: (1)

It sounds like the centre CAT is still there but if not I'm very suprised it pass legally. I'm sure a fair few pass without CAT's but just don't ask which car was actually tested for the emissions at the time!

Luke C

iTrader: (1)

Good to hear my old downpipe went to a good home!

Nice one mate!

jjones

my99 ppp passed with no cats before.

this year failed as centre PPP section had holes in, so i popped a cat on until the replacement turned up.

Luke C

iTrader: (1)

FPMSL

LIDDO

It did! I can hear the Turbo, and it pulls a lot stronger too! Still stinks like **** though after a run, must be still some oily residue on it.

Cheers Luke

PMSL at Flat4. Hope she doesnt go pop, but I dont rag her at all really (the car that is )

Luke C

iTrader: (1)

Mines run in now with new VF-34 and 550 injectors and forged everything.

That stinks like buggery after a good ripping!!!

Nothing like a good thrashing at night then looking under the bonnet to see everything glowing like hell!

LIDDO

Mental Note: No NOT buy Luke's car at time of selling

Luke C

iTrader: (1)

ROFL.....You Git

slickrick

my01 has passed twice with no cats at all,different mot stations aswell.just make sure you get it nice and warm before they start the test.

ALi-B

iTrader: (1)

If it were running lean - it would fail on Lambda, also there is potential for HC emissions be higher due to a lean missfire.


HTH

Edmondo

Just fully De-Catted my MY99 but have 10 months b4 the next MOT - Have kept both pipes but hope to only use Centre for next MOT - I ain't gonna take a chance and run mine thru without Cats...........Good 4 u mate on getting it thru

pslewis

Ha Ha Ha I love this place ........ bollox spoken nightly!

If a car passes an MOT without any CATS whatsoever then its a faulty MOT!!

Thats a FACT by the way, as I said earlier!!

Pete

bzz

I must agree with Pete here. If your car was made after 1993, by law it MUST have at least 1 cat, even if the emissions are ok without, that's why I left my centre cat on. Even if they pass your car without a cat, it means the MOT is invalid legally speaking. All you'd need is for some 'have a go' copper to pull you and check your car out (from other threads on snet I know this has happened) and you can get done for having a defective exhaust, even if you show them your MOT cert. This can carry a substantial fine by the way (from bitter experience!!) Less hassle to keep the centre cat IMHO. Besides, I wouldn't want to trust my pride and joy to a garage that just dishes out MOT certificates without checking your car properly!! After all, there may be safety issues involved - "well, the brake discs aren't too clever, but they'll last another 200 miles, just pass em!!"

Fat Boy

Bit of a stress bunny today, aren't we?

If you look at my post you'll see one of these at the top. That's a hint that I wasn't being entirely serious, ********.

For a more considered approach; there is no way a scoob with no cats (like mine, for instance) would pass the emissions unless there was something wrong with the machine or with the car as scoobs, like most turbo cars, run rich as a safety measure against det.

LIDDO

I have said though, that my car has centre section with resonator, or is it a CAT??? Would it pass just cos this is there????

ALi-B

iTrader: (1)

Apart from your fact is flawed

To be able to fail it - tester "must" know where the cats are on that particular make and model car (most don't - simply too may different cars exist to memorise every specific detail) and be able to tell the difference between what is cat or just a silencer - not to forget the heatshields hiding the down pipe cat

mattvortex

without any CATS fitted am i right in thinking that your insurance would be invalid? was thinking a while ago of having a full de-cat but the thought of having not a leg to stand on in the event of a claim kinda put me off!

FASTER MIKE!!

all car maufactured after august 1992(k reg) have to have cats fitted

mike no cats, and wont pass an mot in his type r