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Author Topic: Exhaust Emission failure  (Read 1390 times)

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holtender

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Exhaust Emission failure
« on: 19 November 2008, 00:56:02 »
Got a call from my brother and his 2000 has failed the MOT on the emission test.

As he will be expecting me to help sort it I'd really appreciate any imput from forum members as the most likely reasons for failure.
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pscocoa

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Re: Exhaust Emission failure
« Reply #1 on: 19 November 2008, 08:14:00 »
it is probably the exhuast and mot station should have advised him. Mine failed on emissions 3 years ago on centre section. Replaced it and no problem.
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MutantCav

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Re: Exhaust Emission failure
« Reply #2 on: 19 November 2008, 08:16:01 »
It only failed on emmisions?? Is the engine running smoothly?
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holtender

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Re: Exhaust Emission failure
« Reply #3 on: 19 November 2008, 16:47:08 »
Exhaust is less then a year old, but the Cat does seem very small, engine ticking over perfectly.

 I was going to look for air air leak or could be a problem with the Lamba sensor, is there any point in cleaning the sensor?

 Any other suggestions?
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Auto Addict

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Re: Exhaust Emission failure
« Reply #4 on: 19 November 2008, 17:21:03 »
Is it a 2ltr?
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holtender

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Re: Exhaust Emission failure
« Reply #5 on: 19 November 2008, 17:32:54 »
It is a 2Ltr
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Re: Exhaust Emission failure
« Reply #6 on: 19 November 2008, 17:36:27 »
Is the engine getting up to temp?
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holtender

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Re: Exhaust Emission failure
« Reply #7 on: 19 November 2008, 17:38:17 »
It appears to be running  fine, temperature just normal.
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markey mark

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Re: Exhaust Emission failure
« Reply #8 on: 19 November 2008, 18:10:45 »
give it a good thrashing before mot  :y
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ians

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Re: Exhaust Emission failure
« Reply #9 on: 19 November 2008, 18:19:18 »
Recent service inc air and fuel filters, plugs, breather/throttle body cleaned?

Has it been standing or in regular use?
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holtender

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Re: Exhaust Emission failure
« Reply #10 on: 19 November 2008, 18:22:07 »
I'm just off to his and intend to change Air filter and clean breathers,

he has been using it daily.

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Kevin Wood

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Re: Exhaust Emission failure
« Reply #11 on: 20 November 2008, 10:18:07 »
Can you post the readings from the failure?

Lambda, HC and CO at idle and fast idle?

This might provide some useful clues.

Kevin
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mahony

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Re: Exhaust Emission failure
« Reply #12 on: 20 November 2008, 10:26:24 »
You can buy a product called cat a clean/cat clean ( think thats what it's called),my mot tester reccomended it to me last feb (he does not sell it!) mine was border line and he advised using it if the emmisions did not pass on the second test,it passed so did not have to use it,think it's about the £15 mark.
« Last Edit: 20 November 2008, 10:26:49 by mahony »
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holtender

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Re: Exhaust Emission failure
« Reply #13 on: 20 November 2008, 22:55:09 »
This is the print out

<img src="http://i36.tinypic.com/aey4d4.jpg" border="0" alt="Image and video hosting by TinyPic">

I've changed air filter, plugs, cleaned breathers and it was given an "Italian job" this morning before getting back on the machine this morning and it failed again.

It has a fairly new Cat on, but it does appear to be very small. Do the Cats vary in size?

I was going to get a new lambda sensor and see if that is the problem.
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Entwood

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Re: Exhaust Emission failure
« Reply #14 on: 20 November 2008, 23:27:35 »
Quote
This is the print out

Just to help out .. here's the image .. :




:)
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