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pre-cat failure

  1. Removing cat/pre-cat bad for engine/computer? 2.5L QR25DE

    Member Rides and Project Cars
    I recently was blessed with the "Check Engine Soon" light. always glorious right? codes come back saying my pre-cat is clogging. so, instead of replacing the pre-cat i'm going to put a header on (duh :rambo: ) So i was wondering if i NEEDED a cat on for the car to run without being too rich or...
  2. QR25DE 2002 SE-R Spec V - Pre-Cat Failure

    Engine Swaps, Builds
    Hi all, Before I get jumped on, I was looking through a bunch of the different forums, but I didn't see one over another that I should use, so I figured I'd start here. This is my first post, and I just joined. If someone can tell me a better place to post this who's more familiar with the...
  3. QR25DE wana buy new qr25de engine

    B15 Sentra (2000 - 2006)
    my engine is messed up due to the precat problem and am looking to buy a new or used engine and catalytic converter so anyone with an engine and or cat for sale pm me please.
  4. QR25DE Class Action Lawsuit (Pre-Cat Failure)?

    B15 Sentra (2000 - 2006)
    Does anyone know if there is a class action lawsuit against Nissan for the " Pre-cat failure" issue? My car has been sitting and I thought I heard something but couldn't find anything anywhere.