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    Daewoo Tacuma twin catalysts? Archived Message

    Posted by Colin Hedger on October 15, 2008, 11:30 pm

    Hi,
    Can anyone tell me why this 1.6 dohc Tacuma has a catalyst in the downpipe plus another further along past the flexipipe?
    Has pre and post 02 sensors before the first and and after the second cat.
    First cat had broken up completely and pieces smashed into the second cat,blocking/destroying that also!
    Tried just replacing the second cat and it now runs fine, mil out and emissions/lambda reading spot on!
    Tempted to leave it at that,but the first cat is obviously for a reason. Why?

    Cheers
    Colin.

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