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Join Date: Feb 2008
Location: United Kingdom
Re: throttle problem
46464928 - CAPACITY MEASURER 95 - 97 1.4 146
46469917 - CAPACITY MEASURER 98 - 00 1.4 146
Seeing as there never was a 1.4 156 I would say that the wrong MAF is fitted. So I conclude that as it thinks more air is entering it's overfueling and when it finally clears you getignition in the exaust, that will kill the cat and lamda. I suggest you get the correct MAF asap and see ifyou've damaged any of the other items.
Also whie doing this research I noticed a duct temp sensor in the intake hose before the MAF, on my 1.6 there is physically no probe there, but in the EPER for the 1.4 there is, I wonder if this probe is faulty too, telling the ECU the air is hotter than it is and this would also cause overfueling.