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Re: Does this UK Ford (Sierra) need a new CAT ?
Posted to Technical Discussion Forum on 10/23/2000 1 Reply

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Assuming that the cat is "lit-off", i.e. fully hot, and the O2S is switching >1 Hz at cruise: the AFR or calculated lambda should be 1.00 +/- 0.02. Be careful about this figure...a leak in the exhaust... Login to read more.

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