Register a free account today to become a member!
Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members through your own private inbox!

leaking cat causing running problems

  phase 1 172
My ph1 failed its emmisions yesterday on the lambda reading,the other 2 were ok

The car has stood for months which was why thought it felt a bit lumpy but since having another look the the cat to centre section gasket is leaking (got one to go on in the morning) its about 2" downstream of a lambda

Is this likely to cause my symptoms?

best way i can describe how it feels is like a old carb'd car like a cortina lol
depends how much your emissions are out TBH,

mine failed the other day and was at 5.3% which is 5% over what it should be, replaced the cat, stealth cat back and new gasket, still failed again. was better but not enough. had to replace Lambda, hey presto... done :)