High Emissions On Idle

[mfennell]

Hi Forum

I am wondering if anyone has experienced the following.

I have just got my IS200 MOTd and the engineer said that the car worked perfectly emissions wise until he left it idle and then it started to come down in reading but then all of a sudden shot up real high ...

Anyone else experience this or anyone any suggestions or ideas what might be causing this ?

Mike.

[Lance]

Dunno but I always make sure I've a bit of super in the tank and the catalytic converter is roasting hot before the MOT. If a cat is not at full working temperature it will not do it's job right and could give funny readings on emissions tests.

[mfennell]

Hi Lance

Yes i am kind of seeing that cropping up quite a bit , strange though that it never happened for the last two MOT's , then again the last two were in the afternoon maybe it was just because it was morning when i got it done the Cat was just cold.

The MOT guy said he had never seen it on any car before and found it very strange .....

Thanks for your thoughts anyway ..

Regards

Mike.