348 red hot cat... ongoing problems! | FerrariChat
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348 red hot cat... ongoing problems!

Discussion in 'Technical Q&A' started by reinerkaiser, Oct 31, 2005.

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  1. reinerkaiser

    reinerkaiser Karting

    Nov 25, 2003
    151
    Redondo Beach
    Full Name:
    Reiner Kaiser
    #1 reinerkaiser, Oct 31, 2005
    just as predicted the first time this happened,
    it wasn't just a problem with my cat. so now i need to
    troubleshoot fuel injection and ignition. I know plenty of other
    people with 348s have seen this issue.

    I did search and saw some MAFS and bad O2 sensor comments.

    I'll pull the codes on the ECU tonight but meanwhile would like to know
    what experience others had with this.

    I am assuming the car is running too rich on the left bank.
    so maybe a bad MAFS or bad spark plug wires or bad ignition?
     
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Brian Crall
    #2 Rifledriver, Oct 31, 2005
    Cats never overheat by themselves. They cannot create a problem they can only respond to one.

    It is not a sign that the car is running too rich, it is a sign that too many hydrocarbons are going downstream from the motor. Running rich is one of many reasons for that.
     
  3. reinerkaiser

    reinerkaiser Karting

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    Reiner Kaiser
    #3 reinerkaiser, Oct 31, 2005
    Thanks Rifledriver. While I realize that thre may be many reasons for this to happen, I wanted to get a good idea of the most likely cause.
    For example, several people on the list had problems with their MAFS. Also, spark plug wires seem to go bad. Injectors might get clogged from put-putting around in traffic. I just wanted to see if other 348 owners had this happen and what the cause for their problem was. this would be something I'd have to look into as well.
     
  4. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #4 Rifledriver, Oct 31, 2005
    Shortcutting the diagnosis of a running problem absent of any other information will only lead to frustration and needless expense. Start at the begining.
     
  5. CliffBeer

    CliffBeer Formula 3

    Apr 3, 2005
    2,198
    Seattle, Washington
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    Cliff
    #5 CliffBeer, Oct 31, 2005
    There is, likely, some unusually high amount of unburnt fuel getting to the cat and this phenomenon is going to be the factor that elevates core temps to the 1,000+ degree level, well above the normal operating temp of the cat (typically between 450 and 600 degrees). So, you need to find out the source of the unburnt fuel. As suggested earlier in the thread, look for the obvious culprits - bad plug wires, overly rich mixture (MAS problem, for example), bad cap/rotor, etc.
     
  6. LennyZeutzius

    LennyZeutzius Karting
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    #6 LennyZeutzius, Nov 1, 2005
    Reiner

    Did you ever get the rear end of your car fixed after the last rear ending ?

    Did you get the body work done in Tijuana like the first time ?

    Does your car still have a salvage title ?
     
  7. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
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    #7 ernie, Nov 1, 2005
    Why? Are you gonna buy it?
     
  8. LennyZeutzius

    LennyZeutzius Karting
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    #8 LennyZeutzius, Nov 1, 2005
    Maybe.

    Can it be bought for under $20k ?
     
  9. ernie

    ernie Two Time F1 World Champ
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    #9 ernie, Nov 1, 2005
    No it's not a 308. Hehehehee.
     
  10. Joe G.

    Joe G. Formula 3
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    #10 Joe G., Nov 1, 2005
    lets not totally hijack the thread Ernie.

    but, 308QV's have moved up. 348's down.

    i think anyways :)
     
  11. reinerkaiser

    reinerkaiser Karting

    Nov 25, 2003
    151
    Redondo Beach
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    Reiner Kaiser
    #11 reinerkaiser, Nov 1, 2005
    zeutzius,

    pretty offensive post, do I know you? what did I do to piss you off?
    Your facts are all wrong.

    -my car does not have a salvage title.

    -repair work was not done in TJ

    please refrain from posting obvious falsehoods on this board
    if you dont know what you are talking about. this is
    borderline slander. I thought i asked a technical question.
     
  12. ernie

    ernie Two Time F1 World Champ
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    #12 ernie, Nov 1, 2005
    Okay back to the topic.

    In your search did you find the thread I posted about a year ago asking about MAFS. There is an adjustment screw on them. Make sure that you are getting the correct readings. In case you didn't here is the thread. http://ferrarichat.com/forum/showthread.php?t=20378&highlight=Mass+Air+Flow+adjustment

    You may also want to have a look at the connection on the rear cam sensor. Make sure everything checks out fine on it.

    Something like this is pretty tough to nail down. You could go get an exhaust test done. Each cylinder has a port on the exhaust header that can be opened, and the exhaust gasses tested. This will tell you exactly what each cylinder is doing, and can point you in the right direction.

    I feel your pain bro. I had a misfire that bugged my for several months. It finally turned out to be one stupid little wire that was busted.
     
  13. reinerkaiser

    reinerkaiser Karting

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    #13 reinerkaiser, Nov 1, 2005
    Ernie thanks. Yes I did see your post and will investigate the MAFS.
    Will probably need to run an engine diagnostics and go from there.
    do you know if Tillack in Redondo beach has equipment to do this?
     
  14. ernie

    ernie Two Time F1 World Champ
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    #14 ernie, Nov 1, 2005
    That I don't. But I do know that Michael, at Ferrari Service of Costa Mesa, does.
     
  15. tbakowsky

    tbakowsky Two Time F1 World Champ
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    Sep 18, 2002
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    #15 tbakowsky, Nov 1, 2005
    Take your car to a shop with a 4 gas annalyzer. Take all reading BEFORE the cats on each side of the engine and compair results. After you have this info you will be better equiped to trouble shoot your problem.
     
  16. LennyZeutzius

    LennyZeutzius Karting
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    #16 LennyZeutzius, Nov 1, 2005
    Renier,

    Yes, don't you remember ? We met down at the beach.
    Sorry, I thought the repair work was done in TJ. I could of swore that's what you said.
    Was it done locally ? I'd like to know so I can take my 308 there.

    Sorry for any confusion.
     

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