348 brotherhood strikes again -- fixed idle problem | FerrariChat
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348 brotherhood strikes again -- fixed idle problem

Discussion in '348/355' started by potxoli, May 14, 2008.

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  1. potxoli

    potxoli Formula 3

    Mar 22, 2007
    1,716
    Washington DC
    Full Name:
    Eric B.
    #1 potxoli, May 14, 2008
    Today I was going to go to work with the 348. I've had a slightly erratic idle for the past month or so (getting worse), but this morning, I turn it on and immediately it dips to 500rpm, surges and then stalls. Doh -- have to go to work with the bimmer. I spend sometime researching idle issues and find this gem of a post from whyte:

    http://ferrarichat.com/forum/showpost.php?p=137343470&postcount=10

    Sounded exactly like my symptoms, low RPM, burbling exhaust on deceleration. All pointed to the TPS (Throttle position sensor).

    So I follow the post above, clean them with the radioshack potentiometer cleaner, disconnect the battery, let it idle 10 minutes and BAAMM! Rock solid idle at 1000rpm, not a hint of movement. Car seems to pull a lot more. Like whyte said, the high rpm exhaust note is insane, not sure why that is different, but it is.

    All is well again in my world :)

    Thanks brotherhood!!!
     
  2. FandLcars

    FandLcars F1 Rookie

    Aug 6, 2006
    3,057
    Tempe, Az
    Full Name:
    Rick Schumm
    #2 FandLcars, May 15, 2008
    Glad you apparently found the problem! The Brotherhood sure is a lifesaver for a lot of owners!!
     
  3. ernie

    ernie Two Time F1 World Champ
    Lifetime Rossa Owner

    Nov 19, 2001
    22,620
    The Brickyard
    Full Name:
    The Bad Guy
    #3 ernie, May 15, 2008
    Yet another successful do-it-yourself job!

    Nice work, and way to use that search button.
     
  4. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,224
    Mount Isa, Australia
    Full Name:
    Pap
    #4 PAP 348, May 15, 2008


    +1! :D:D
     
  5. gothspeed

    gothspeed F1 World Champ

    May 26, 2006
    10,244
    U.S.A.
    Full Name:
    goth
    #5 gothspeed, May 15, 2008
    +2............... :D :D
     
  6. whyte

    whyte Formula Junior

    Apr 25, 2006
    409
    Merritt Island, FL
    Full Name:
    John C
    #6 whyte, May 16, 2008
    Awesome! Glad it helped.

    Those ECUs do a pretty good job of keeping your engine running, even when things are subpar. My car ran "ok" while having minor issues with all of these:

    TPS cleaning
    Contacts
    Idle Air Bypass
    Throttle Bodies
    Cam Sensor Contacts

    After some basic maintenance on these items, and a few others, the car's character has taken on a much more refined feel. I'd encourage any owner to take the time to go through these, and any other "tune up" type issues, on a regular basis.

    As as footnote, I was very happy with my major service but none of these things I mentioned above were identified or corrected during my $9,000 major. I suspect some of these issues have never been addressed since the car was new. I mention this not to criticize the dealer's work, but rather, to remind owners that a Major/Minor has a defined scope of work involved (generally) and does not necessarily include correcting some of these common quirks that fall somewhere between routine tune-up and minor repair.
     
  7. potxoli

    potxoli Formula 3

    Mar 22, 2007
    1,716
    Washington DC
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    Eric B.
    #7 potxoli, May 16, 2008
    This is exactly what I've come to discover as well. I guess you just assume given the price tag for these things that they would go over every last bit of the car with a fine tooth comb, but that is unrealistic.
     
  8. PassionIsFerrari

    PassionIsFerrari Formula 3

    Aug 15, 2004
    2,454
    #8 PassionIsFerrari, May 17, 2008
    where is the TPS located? or if there is 2...where are they both?

    Thanks
     
  9. potxoli

    potxoli Formula 3

    Mar 22, 2007
    1,716
    Washington DC
    Full Name:
    Eric B.
    #9 potxoli, May 17, 2008
    there are two, they are on top of the throttle bodies. You will see the wires connecting to them. Simply detach the wires, unscrew the two screws each (be careful, there is a washer, don't drop it). pull them out, spray, twist pot around to clean and put them back. All of 20 minutes.

    l
     

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