355 - Doe the Capristo Exhaust cause a check engine light? | FerrariChat
Buy

355 Doe the Capristo Exhaust cause a check engine light?

Discussion in '348/355' started by JohnnyTT, Sep 3, 2021.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. JohnnyTT

    JohnnyTT Karting
    Silver Subscribed

    Aug 12, 2012
    142
    NJ
    Full Name:
    John
    #1 JohnnyTT, Sep 3, 2021
    Hello all,

    I did a search and couldn't find anything definitive. My newly purchased 99 355 gts is getting checked over by my local specialist before I take delivery, and it is all stock. Went to see it today for the first time and was asking his opinion on exhausts. His preference was Tubi.

    He said he's installed capristo's in the past, but they would cause sporadic check engine lights due to temperature fluctuations. I didn't get the details because I had my 2 year old with me and she was in need of some attention at the same time.

    Or was he referring to their valve kit?

    Thanks in advance!
     
  2. Kokose7en

    Kokose7en Karting

    Dec 5, 2019
    209
    SF Bay Area
    #2 Kokose7en, Sep 3, 2021
    I would assume the check engine light was caused by forcing the exhaust bypass valve open, which is common to have the check engine light on during idle or cruising. That is not particularly on the brand of cat back exhaust.
     
    OCKlasse and carnutdallas like this.
  3. kenneyd

    kenneyd Formula 3

    Sep 30, 2014
    2,017
    NE FL
    Full Name:
    Ken
    #3 kenneyd, Sep 4, 2021
    Most ears prefer the Capristo, but Tubi is still great.

    I run four different exhausts, never had any of the exhaust cause a check engine light. However, messing with the bypass can cause a check engine light.

    Ask for a check engine lights in general, You're going to see a few from time to time. I'd recommend buying a scanner, Note the code, clear it, and don't worry about it unless it comes back, then address it.
    We've all gotten so used to modern cars, I've had several other cars from this time period When OBD2 came out, and is normal just to have a random code every once in awhile.
    It helps to think of it as a whiny supermodel lol
     
    JohnnyTT likes this.
  4. taz355

    taz355 F1 Veteran
    Owner Silver Subscribed

    Feb 18, 2008
    6,016
    Indio Ca/ Alberta
    Full Name:
    Grant
    #4 taz355, Sep 6, 2021
    Had mine over 15 years and no check engine lights unless something else was wrong.
    You need cats and o2 extenders.
     
  5. JohnnyTT

    JohnnyTT Karting
    Silver Subscribed

    Aug 12, 2012
    142
    NJ
    Full Name:
    John
    #5 JohnnyTT, Sep 6, 2021
    I'm just looking at catback for now.
     
  6. A348W

    A348W Formula 3

    Jun 28, 2017
    1,846
    North Wiltshire, UK
    #6 A348W, Sep 7, 2021
    I’ve cap, exhaust and bypass value. No name sports cats. (With thermocouples disconnected) Headers are oem.

    no check lights.

    Just a habit of playing bypass valve on the throttle :)
     
    JohnnyTT likes this.
  7. taz355

    taz355 F1 Veteran
    Owner Silver Subscribed

    Feb 18, 2008
    6,016
    Indio Ca/ Alberta
    Full Name:
    Grant
    #7 taz355, Sep 10, 2021
    What kind of cats do you have ?
    I have had hyperflows for about 12 years and 1 has gone so looking to replace both looking for options Now.
    Thanks
     

Share This Page