dn12345

Hello all,

Took my RA for its MoT a few weeks back and it failed on the emissions - sky high apparently. Now, I know I had a replacement exhaust last year from the clinic and i'm assuming the section they put on had no cat but I was under the impression that as long as you still have the cat on the downpipe then it'll still pass.

Anyway, what I'm asking is: how do i check to see if the downpipe cat has been removed and if it hasn't, then why are the emissions so high? Oh, and what can I do about it that won't cost me and arm and a leg??!!

Thanks in advance

Dave

myblackwrx

iTrader: (1)

What year is the RA?
As if it's a pre Sept 95 the emissions test is a lot more lenient.
The downpipe (without cat) just looks like a bit of piping, with cat it has a bulge in it.

The rookie

iTrader: (1)

What was the result, if they were really 'sky high' then its possible you were running rich enough that the catalyst stopped converting (anything over about 1.5% CO at the tailpipe means your running so rich that the can't will stop converting, even a decat car running Lambda1 should only be about 0.67% CO at the tailpipe.

Simon

rossyboy

iTrader: (8)

More than likely to be a duff lambda sensor IMO if the downpipe cat is still in place. I've had 2 go in about 17,000 miles.

dn12345

Thanks guys,

I'll check to see if it has the downpipe cat. Can't remember how high it was but it's an early 96 model so the lamda could well have gone.

I'll drop in into the local station to test again to see what the reading is and go from there

The Rig

iTrader: (13)

am i right in saying,imports have 2 cats,downpipes and mid section,uk cars only 1 in downpipe ?

The rookie

iTrader: (1)

Not as I understand it...
Clasics:-
All have one in DP, one in centre except some STi's which have a proper resonator (not a straight through silencer) inplace of the centre cat (very stealth for insurance purposes as a de-cat!).
Newage it gets far more confusing with all the combo's, but you have to add in the up-pipe cat on non-Sti's (real ones not the type UK cheat)

Simon