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Old 02 June 2009, 13:40   #11
Leapy's Avatar
Country: UK - England
Town: Sheepy Parva
Boat name: Sadly Sold
Length: no boat
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Originally Posted by Hightower View Post
If the cat has gone, surely it would fail everytime?
Yes, and by a significant margin

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Old 02 June 2009, 13:51   #12
chewy's Avatar
Country: UK - England
Town: Up Norf
Make: Avon SR4,Tremlett 23
Length: 4m +
Engine: Yam 55, Volvo 200
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I had a brand new cat fitted and it did the same thing as yours. I didn't know if it was breaking down inside and causing it to fail.

Some cars can pass MOT's with decat pipes.

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Old 02 June 2009, 14:13   #13
Country: UK - England
Town: bristol
Boat name: astra
Make: zodiac 340s
Length: 3m +
Engine: 15hp mariner
MMSI: 235905847
Join Date: Mar 2009
Posts: 230
I have never had a car pass with a decat pipe unless its a lpg conversion or a vehicle not listed in the emmisions 14th adddition booklet,As for having aftermarket cats fitted its a no no they are useless
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Old 02 June 2009, 16:45   #14
Hightower's Avatar
Country: UK - England
Town: Fareham
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Originally Posted by astra View Post
Is it a aftermarket cat or a genuine one
I've got to assume it's a genuine one. I've had the car 5 years and never felt the need to replace it. That said I'd like to remind you that since I've bought the car I've always had problems during the emmissions test.

My Rover failed the emmissions earlier this year and I got an aftermarket cat fitted. This was the first time I've failed the emmissions in this car and passed with flying colours after fitment.


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