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Decent Cat Converter

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GlennyGills
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Decent Cat Converter

Postby GlennyGills » Wed Mar 21, 2018 1:39 pm

Hi,
Just sent the car for MOT and advised that it had failed on emissions again. A new Cat was fitted in April last year and the car has only done max 2500 miles this year. But it failed.
The tester phoned me around 6:00pm and asked me to give it a good run at high revs to get the exhaust hot. After 10 miles of enthusiastic driving the exhaust smelt hot, but the CO reading was 0.4 and apparently the limit is 0.3.

It seems as if after having to get rid of the 19 year original cat, I will be replacing them every year at around £90 per time.

Does anyone know of a good quality replacement cat?

Thanks
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Re: Decent Cat Converter

Postby Mazda Mender » Wed Mar 21, 2018 9:16 pm

What cat make did you fit?
M-m
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This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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Re: Decent Cat Converter

Postby GlennyGills » Thu Mar 22, 2018 8:00 am

Hi Wayne,
It was fitted by the Garage, I suspect a generic version. Fortunately, the garage got it changed under warranty so no cost. I do see many comments though indicating poor life for aftermarket Cats. Do you have a suggested brand?
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Re: Decent Cat Converter

Postby Mazda Mender » Fri Mar 23, 2018 7:17 am

The aftermarket cats are craptastic, thats why they are cheap,good for a years MOT and use... i either fit a good s/hand unit or de-cat and re fit the aftermarket cat 3-2 weeks before MOT, get her through and a clean ticket then remove and bang the de-cat back on....if it is all greased up should take all of 30 mins to change, so you are only useing it for MOT's..
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
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GlennyGills
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Posts: 410
Joined: Tue Jul 10, 2012 8:13 pm
Location: Reading

Re: Decent Cat Converter

Postby GlennyGills » Mon Mar 26, 2018 3:13 pm

Tried to get a second hand Cat, but difficult to buy. I must admit I did think of your alternative option.
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust
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Lazza
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Re: Decent Cat Converter

Postby Lazza » Tue Mar 27, 2018 10:28 pm

Might also mean it is running rich and/or it has a misfire which is killing the cat. They don’t like unburnt fuel.
Lazza

2001 Mk2.5 MX5 1.8 Sport
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Re: Decent Cat Converter

Postby Mazda Mender » Wed Mar 28, 2018 6:15 am

No...Aftermarket cat....= crap
M-m
The Disclaimer:-
This post is a natural product made from recycled electrons. The slight variations in spelling and grammar enhance its individual character and beauty and in no way are to be considered flaws or defects, the articles/answers/comments are provided for information purposes and they are not intended to substitute informed professional advice, I or mazdamenders.net cannot personally be hold responsible for any damage occurred from following this procedure or any injuries from it. Proceed at your own risk.


Mk 1 Eunos 93 black V.S II 1.8 ,
Mk 2 .1/4 Roadster 99 black & gold V.S 1.8 being rebuilt,
Mk 1 Eunos 90 1.6 (claimed by daughter)
MK 2.1/4 Blue V.S Roadster 1.8 99 ...being rebuilt

http://www.mx5oc.co.uk/ http://www.mx5nutz.com/forum/ http://miata.net/ http://www.autolinkuk.co.uk/
User avatar
GlennyGills
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Posts: 410
Joined: Tue Jul 10, 2012 8:13 pm
Location: Reading

Re: Decent Cat Converter

Postby GlennyGills » Wed Mar 28, 2018 12:41 pm

Lazza,
H/C analysis was OK once new CAT fitted - so don't think it is that.
'96 Gleneagles MeisterR Coilovers - engine bling stainless mx5parts full exhaust

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