GolfGTIforum.co.uk
General => The garage => Topic started by: Cupra Turbo on 19 January 2004, 17:08
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If I De-Cat my 8v will it fail the emissions test?
Does the 8v NEED the cat? I heard some cars dont NEED it to pass the emissions test...
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Yes you wil fail the emmissions test .
The reason other cars can pass without one is due to the fact that they were built before manufacturers were forced to put them on every car .
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I was able to remove the one from my Audi but that is because its on an 'H' plate, 1991. I think its from April (or thereabouts) 1992, all vehicles must have a cat fitted and will be tested accordingly.
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Just looked in the MOT manual and it looks like its August 1992 onwards:-
http://www.motuk.co.uk/manual_730.htm
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Yep that is correct, Aug 92 K reg onwards will require a cat. Rich is correct as ever :-*
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so de-catting will make my emissions too high?
I know lads who've de-catted their cars and they pass MOT's and sum have W Reg Scooby's and new Corsa's etc
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August 92 onwards, a car MUST be fitted with a cat, it is illegal to use on the road if removed. Must be a dodgy MOT.
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Its common practice on vehicles after august '92 to fit the cat back on for MOT's and remove it the rest of the time and fit a bypass pipe.
If you get stopped for a random roadside emissions test I think you would be a bit screwed if your cat wasn't in place.
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I there any point to removing the cat? i know the idea is to remove a and obstacle to air flow, but does it actually improve performance noticably? isnt the Lambda sensor inside the cat, so wouldnt removal mean the injection system cant adjust itself quite right?
sounds like too much trouble for being uninsured, which you definatly will be...
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When changing the cat for a pipe , the lambda sensor will screw into that.
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I've still got my lambda sensor.......they cut the boss off the old cat and welded it to my new pipe.
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Why do newer cars need cats? surely new engines are cleaner than those iron blocks that they used to use in the 80's etc...
i'd have thought if new cars needed em then odl cars definately should need em... i always see old E reg's etc puffing loadsa black smoke during gearchanges etc
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Newer cars need cats to cut down on emissions, it makes no difference really, all engines in good condition burn fuel so will emit something, cats turn the harmful gases into water and harmless gases.
Theres no way any engine is going to produce under 0.5% co without a cat, this is the limit for the MOT.
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and older cars dont require them cos they werent standard?
I think any old car that had a cat, shouldnt be allowed to remove it
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The regulations for emissions are much more relaxed for cars registered before Aug 92.
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they should chage the regulations then! :-*
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But cats are expensive units and fitted to old cars they would seriously screw up an engine that wasn't designed for one meaning further expence.
They couldn't make everyone with an old car by and fit a cat. Would be ridiculous! ...But bloody funny... hang on... I don't have an old car...
... Yes lets change the regulations! Give all you mk2 owners something to moan about!
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yeah, fit a cat to all those mk1/2's ... heh heh
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you only want that to slow us down so you lardy arse mk3's dont feel left behind :P
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Putting a cat on a early car will produce more pollution than a correctly set up engine. To manufacture the cat causes a heap of bad stuff, just not in our back jard tho. Bit like having a electric car, the exhaust pipe is at the power station, not the back of the car. Cats were a product of the gummermint, not common sense. Gee, I have had a bad week >:(, must stop moaning.
Steve.
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you only want that to slow us down so you lardy arse mk3's dont feel left behind
shame the mk3 is an overall sexier car...
and the mk2 is about 0.000001 faster... the mk3 only weights a lil bit more and IIRC its got more power... just
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still faster tho! ;) :P