Catalyst

[Sukh13]

If I were to buy a catalyst from a scrappy for a Fiesta, how would I tell if it was in good condition?

Mine is already broken due to a misfire and I want to replace it, but not end up with a dud.


Thanks

[TheEnd]

I don't think there is any way to gauge the condition without using it for a while and see what it is like.

[anonymous-user]

If you can see into the end of the catalyst, you can look for obvious substrate damage, which if it has been killed by a misfire etc will show up. But you can't really establish it's health (oxygen storage capacity) by just looking! (you need to fit it and record the ratio of upstream lambda "switches" to downstream lambda switches)