O2 sensor or wire to it as it's just been disturbed (if ECU can't sense if
>wire's broken) or temperature sensor so ECU thinks the engine's cold all the
>time so richens the mixture (as needed for starting).
>
>>>> took car for mot today (mondy 1.8 zetec mk2 p reg) failed on cat.
>>>> Couple of weeks ago i replaced exhaust manifold as old one had cracked.
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>>
>> Tim..
thanks for your replies! I have changed the o2 sensor and this morning the egr valve. i noticed that when i removed the vacuum pipe the car ran better. however after fitting the new one the bastard resorted to its usual s*it!