Mondeo failed MOT on emissions - what can I check at home?

Oct 04, 2004 6 Replies

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Mike P 21 years ago

My MK1 Mondeo 1.8 Zetec failed it's MOT today on emissions.

Fast idle - fail

CO 9.45% HC 334ppm Lambda 0.79

Second Fast idle test - Fail

CO 1.12% HC 104ppm Lambda 1.00

Natural Idle test - PASS

CO 0.31%

Any pointers as to what's wrong? The car has been abused[1] a little I have to admit. As the second fast idle test is much better, will a long-needed airfilter, set of plugs and leads, and an Italian tune-up rectify it, or am I looking at £££££s getting the codes read at the dealer again?

[1] by abused I mean it's had regular oil changes, a set of discs and pads, and nothing else at all.

Thanks!

Mike

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Doki 21 years ago

Try a bloody good caning and take the free retest?

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Mill Autos 21 years ago

Did the emission fail give an oil temp or did it say it was by passed?

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Mike P 21 years ago

Says it was bypassed. Why?

Cheers

Mike

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Paul King 21 years ago

'cos if it was bypassed, there's a fair chance that the engine wasn't up to temp - causing the fail 'cos the autochoke was still on!

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dojj 21 years ago

but it's not a diesel is it Italian tune up after the new air filter and make sure you get it to the station when it's hot failing that, is the cat ok?

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adder 21 years ago

The first and second readings are quite different which is a bit odd. Certainly check the air filter & spark plugs & rotor arm/cap if there is one.

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