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F355 Engine light

Discussion in 'Technical Q&A' started by dlsh1, Oct 20, 2012.

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  1. dlsh1

    dlsh1 Rookie

    Sep 29, 2010
    24
    Florida
    Full Name:
    Seth Fellman
    #1 dlsh1, Oct 20, 2012
    I have had my 355-5 speed in the shop 4 times due to engine light on. I have repalced CATS, tubis, sensors. Any come accross this or suggestions on why the light keeps coming on.

    DLSH1
     
  2. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,783
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    #2 plugzit, Oct 20, 2012
    Seth-
    There are many threads on this forum about CELs, and a great deal of information about diagnosis and causes. We'll need more details about your car, how it's equipped, and the circumstances under which the lights come on. Also, if you can tell us what the shoop has told you about the cause that might help too. Tell us:
    Year model
    Exhaust if other than stock
    Running temperature
    How you're driving when it comes on
    Does it flash?
    Does it go away or stay on?
    Come on immediately when you start it?
    Any other info you can provide.
    Codes on OBD2 reader?
     
  3. dlsh1

    dlsh1 Rookie

    Sep 29, 2010
    24
    Florida
    Full Name:
    Seth Fellman
    #3 dlsh1, Oct 21, 2012
    Hi Bruce:

    Nice to hear from you - please my responses below.

    I bought this 1997 F355 - 6 speed from a dealer, had all guides replaced, and two soft top motors (behind seats). Ran the car for 6 months and a connecting rod bolt blew out the block. Put an engine it w/ 9K miles and ran perfect for 6 months. Light went on and replaced sensors. 3 months later - light on and a forgot what it needed but fixed minor issue. 4 months later light on and just put 2 new CATS. Light now back on and sending back to dealer (Ft. LAuderdale Ferrari). My mechanics closed their shop and went to work for dealer. They were the best - oh well.

    See below:

    Seth-
    There are many threads on this forum about CELs, and a great deal of information about diagnosis and causes. We'll need more details about your car, how it's equipped, and the circumstances under which the lights come on. Also, if you can tell us what the shoop has told you about the cause that might help too. Tell us:
    Year model 1997 F355
    Exhaust if other than stock TUBI EXHAUST
    Running temperature Before it went in for CATS it was hot 270 Deg.
    How you're driving when it comes on I drive VERY conservative, maybe going 70MPH
    Does it flash? No - every time it went on it stays, and needs computer to turn off
    Does it go away or stay on? Always stays on - I do remember the "slow down" has also gone on before - but turns itself off.
    Come on immediately when you start it? Yes - now that is went on Friday night it permanently stays on
    Any other info you can provide. Other than very frustrated - no
    Codes on OBD2 reader Will let you know

    Thanks much - appreciate your comments

    I saw you are in RE bus - me to
     
  4. Mr. V

    Mr. V Formula 3

    Oct 23, 2004
    1,247
    Portland, Oregon
    #4 Mr. V, Oct 22, 2012
  5. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,048
    USA
    #5 f355spider, Oct 22, 2012
    Were the "new cats" oem or aftermarket?

    And of course, we need to know what the P codes are that are tripping the "check engine" light.

    Might be worth it, for you to own your own OBDII code reader, they are very inexpensive. If you own a laptop, you can buy a connecting cord and software for less than $15 on Ebay.

    Thanks
     
  6. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,048
    USA
    #6 f355spider, Oct 22, 2012
    I think we should wait for more information before going to the "shotgun" approach to a solution. The kit is excellent (and recommended), and can solve many issues, but I hate to recommend that, if he has a more obvious problem that needs to be resolve first.
     
  7. dlsh1

    dlsh1 Rookie

    Sep 29, 2010
    24
    Florida
    Full Name:
    Seth Fellman
    #7 dlsh1, Oct 22, 2012
    The cats were brand new (Tubi) from the dealer $3K - their cost.

    I'll wait to see what the computer says.

    Thanks much
     
  8. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,048
    USA
    #8 f355spider, Oct 23, 2012
    Just a guess, but I suspect you will have codes for "low catalyst efficiency". Seems consistent on this forum that aftermarket cats on the F355 will throw these codes. Sometimes immediately upon installation, other times after a year or two of use. Happened to me, I am back to using oem catalysts. My local dealer says the Motronic on the F355 has the parameters set very tightly.
     
  9. BLAMPEE

    BLAMPEE Man Card Status: Never Issued

    Jun 28, 2008
    15,424
    Sunny Heavenly Beautiful Arizona
    #9 BLAMPEE, Oct 23, 2012
    p0422 and/or p0423 :cool:
     
  10. dlsh1

    dlsh1 Rookie

    Sep 29, 2010
    24
    Florida
    Full Name:
    Seth Fellman
    #10 dlsh1, Oct 23, 2012
    Thanks much for your thoughts.

    Seth
     

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