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[alexandjen]

I always try to give my cars a good hard drive on the way to the MOT station TBH... I'd say it's probably a leaky exhaust too

Agreed I did this earlier just before driving into the testing station, thrashed the knackers off the old girl, tester actually told me to leave the engine running and he did the emissions test first...........passed with ease

[Essex_Andy]

The lambda value says lean, whereas the CO means exess fuel, i.e. rich. I'd say a vacuum leak is playing up the lambda signal. If you have a decent voltmeter you can easily check what kind of signal you get from the lambda.
E85 is brilliant for bringing down CO levels, but AFAIK it's hard to find in UK.

I believe E85 is known as Total Exellium(sp) over here? ? ?

[magnul]

No. E85 is 85% ethanol and 15% gasoline. Excellium appears to be gasoline with a bit of snake oil added.

[Albert1]

Try Cataclean, although it may take a while (several days) to finish pushing the crap out the tailpipe, before emissions improve.

Well, all the cataclean in the world won't help if the engine is overfueling. I''d start with a check of the lambda sensor and take it from there. Still, I agree that running the car like you stole it is a good idea prior to MOT.

Running the car like you stole it?  You mean never exceeding the speed limit and driving like an old granny so as to avoid attracting attention from the police?  How will that help?

[Kevin Wood]

No. E85 is 85% ethanol and 15% gasoline. Excellium appears to be gasoline with a bit of snake oil added.

 

How true.

Oh, and it has extra profit margin added too.

Kevin

[Martin_1962]

Try Cataclean, although it may take a while (several days) to finish pushing the crap out the tailpipe, before emissions improve.

Well, all the cataclean in the world won't help if the engine is overfueling. I''d start with a check of the lambda sensor and take it from there. Still, I agree that running the car like you stole it is a good idea prior to MOT.

Drive it like you are chasing someone who stole another car

[magnul]

Running the car like you stole it?  You mean never exceeding the speed limit and driving like an old granny so as to avoid attracting attention from the police?  How will that help?

You know, there are smart thieves and stupid ones. Drive like the stupid ones prior to MOT

[downsmen]

Hi Kevin

Thanks for your help i did everything you said and it sailed through today, thanks again to every elses suggestions

Paul