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Author Topic: Hi emeissions  (Read 5557 times)

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TonyBrister

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Hi emeissions
« on: 23 August 2009, 20:15:39 »
Hi, my 2.2 Omega is failing its MOT on High and I mean sky high co2 at fast idle, everything apears hife and the engine is running as sweat as possible, there are no faults showing and the emissions are fine at tickover, The breather system is clear it has had an oil and fillter change and a flush, a new cat and a new airflow meter tried but at 2500-300 rpm the co2 goes off the scale. Has anyone encountered this before?
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Welung666

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Re: Hi emeissions
« Reply #1 on: 23 August 2009, 20:55:23 »
Yep me  >:( You need to get the codes read and you'll probably find you've got P0170 as a fault. Where are you?
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TonyBrister

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Re: Hi emeissions
« Reply #2 on: 23 August 2009, 21:33:30 »
I'm in Exeter Devon
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Kevin Wood

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Re: Hi emeissions
« Reply #3 on: 23 August 2009, 21:37:41 »
I wonder if it's a faulty lambda sensor?

Would be good to get some live data from it to see what the lambda sensors and fuel trim are doing. :-/

Kevin
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TonyBrister

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Re: Hi emeissions
« Reply #4 on: 24 August 2009, 06:12:36 »
No faults are showing atall, Lambda is reading spot on.
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Kevin Wood

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Re: Hi emeissions
« Reply #5 on: 24 August 2009, 09:20:48 »
Do you have the figures from the emissions test print out? Can you post them up please?

Kevin
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TonyBrister

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Re: Hi emeissions
« Reply #6 on: 24 August 2009, 17:01:58 »
Hi Kevin
At fast idle the co 1.28, HC 1.96 and Lambda 1.00
Tony
Also exhaust smoke is to dark grey
« Last Edit: 24 August 2009, 17:08:21 by tonyB »
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Miggy24

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Re: Hi emeissions
« Reply #7 on: 24 August 2009, 19:35:19 »
Hi Tony im from newton abbot.What year is urs
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TonyBrister

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Re: Hi emeissions
« Reply #8 on: 24 August 2009, 19:46:42 »
Hi, It's 2001 94000 mls. Had it since 2004
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Miggy24

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Re: Hi emeissions
« Reply #9 on: 24 August 2009, 19:50:06 »
Iv got a code reader that should read it then mate :y
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TonyBrister

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Re: Hi emeissions
« Reply #10 on: 24 August 2009, 19:55:47 »
Garage say's it reads as all clear on the faults...
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Miggy24

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Re: Hi emeissions
« Reply #11 on: 24 August 2009, 20:05:29 »
Have u tryed giving it a really good blast down the motorway
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TonyBrister

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Re: Hi emeissions
« Reply #12 on: 24 August 2009, 20:12:56 »
I blast up and down the motorway everyday to and from work...
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Andy H

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Re: Hi emeissions
« Reply #13 on: 24 August 2009, 20:24:29 »
The emissions figures you have from the MOT are measured in the tailpipe after the catalytic converter. The cat can confuse diagnosis by continuing combustion of fuel that should have burnt in the engine. The high HC figure is not good. The lambda reading isn't very informative as it is after the cat.

With a diagnostic tool (such as Tech2) that can show live readings an experienced user can do a lot more than read fault codes. In particular the lambda sensor can be observed working (or not).

Do you have any misfiring? Are the crankcase breathers clear?
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TonyBrister

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Re: Hi emeissions
« Reply #14 on: 24 August 2009, 21:33:10 »
There is no misfire at all tick over is 750-760. the guy at the garage says the lambda is + & - ing as it should. The breathers are clear and the fuel pressures are ok as are the vacume, obviously something is telling it to overfuel but the question is what
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