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rhanco1

Fiesta Mot Fail. Help

6 posts in this topic

Hi All,

My 04 Fiesta 1.4 failed the MOT on omissions.

The reading when idle was 1.4. It should have been 0.3.

The garage wants to charge me £50 to put it on diagnostic machine but implied it was the lambda sensor.

Is this correct and if so which sensor would it be. Front or back.

Lenny likes this

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the lamba sensor should sit around the cat area on the exhaust system....

try a bottle of cataclean cost 11 quid from euro, this states to do amazing things with the whole combustion chamber, injectors and the whole exhaust system..

maybe giving it a service and a good Italian tune is in order?

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Just had service and motorway driving regularly.

Drives really well. Only mild lurch when first started in the morning then no problems.

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im presuming its petrol.....

chuck a bottle of cataclean in, when tank is 1/4 full n take it for a drive..... this is what ive done with my 1.8tdci, i have noticed must difference to be honest, but it kick's out less smoke than before

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says on the bottle lol

post-34591-0-70428100-1402304870_thumb.j

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Lambda sensor is certainly a likely falling point for that part of the MOT, definatey worth trying to give it a clean and boot it down the motorway.

Failing that, you could have a leak somewhere, either the inlet manifold is partly damaged (split or crack) or perhaps a pipe or hose is split around the air intake (after the MAF sensor).

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