Will taking the cat off affect the running off the car ECU/Lambada? - Alfa Romeo Forum
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Will taking the cat off affect the running off the car ECU/Lambada?

Its an option I'm considering if the exhaust cannot be made to sound a bit meatier.

I didn't consider that this would affect the car in any way until someone mentioned it on another thread.

Will it cause me problems?
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The lambda sensor will not accomodate the removal of the catalysts. Also the car will not pass an MOT without them. The noise level is influenced more by the silencers, therfore modify the exhaust after the catalysts.
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On a CF2 engine the Lambda sensor is before the Cat, so it doesn't know of care if the Cat is there or not.

On a CF3 it depends which Cat you are looking to remove.

But not having a Cat on a car that needs one is an MOT failure no matter how good the emissions are. But they bolt back in easy enough...
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