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Message: <blockquote data-quote="spikyone" data-source="post: 315863" data-attributes="member: 6071"><p>Just my 2cents but usually doesn't unburnt fuel passing by from the engine will damage (poisoning) the cells inside the cat? So instead of replacing with a new expensive cat at the back of an engine which still puts out unburnt fuel which will cause the same problem later would it be that a bit of tuning to reduce the amount of unburnt fuel should clear matters up?? I read this from a BMW car magazine which had an article on catalytic converters and their usage, let me check through my archive and get back to you on the exact issue and what it says.</p></blockquote><p></p>