348 idle problem | FerrariChat

348 idle problem

Discussion in '348/355' started by pjwardau, Aug 20, 2011.

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  1. pjwardau

    pjwardau Karting

    Jul 31, 2009
    103
    Sydney, Australia
    Full Name:
    Peter
    My 348 is still driving me a little spare with a surging idle from a cold start (ie engine stone cold after a cool night)

    RPM will go from 800 to 1500 for about 3-4 minutes, then as the engine warms, settle down to 100rpm and purr like a kitten.

    I have tried adjusting both idle valves.... no change.
    Installed new idle regulator motors (absolute bargain from Rockauto) no change

    Running out of ideas....
     
  2. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,232
    Mount Isa, Australia
    Full Name:
    Pap
    Have you tried the "re-learn" procedure Peter? :)

    Disconnect the battery for a minute or two, connect and start the car. Leave the engine idle for at least 15 mins without touching the gas pedal. :D

    Try that and go from there Brother. :)
     
  3. pjwardau

    pjwardau Karting

    Jul 31, 2009
    103
    Sydney, Australia
    Full Name:
    Peter
    Thanks Pap...yes..but worth another try I guess.

    By the way once it warms up it idles at sweetly 1000 rpm... my earlier post had a typo :)
     
  4. PAP 348

    PAP 348 Ten Time F1 World Champ
    Lifetime Rossa Owner

    Dec 10, 2005
    100,232
    Mount Isa, Australia
    Full Name:
    Pap
    Hmmmmmmmm, ok. Give it another shot and see what happens Pete. :)

    In the meantime, sleep time for Pap. Night shift tonight. ;)
     
  5. plugzit

    plugzit F1 Veteran
    Silver Subscribed

    Dec 1, 2004
    7,792
    Redondo Beach, CA
    Full Name:
    Bruce Bogart
    I think some guys use the battery disconnect regularly not realizing that relearn is necessary each time. A loose battery connection (or bullet connector) plus temperature changes, etc, might also cause that. Good luck and let us know what you find!
     
  6. chas-3

    chas-3 Formula 3
    Silver Subscribed

    Jan 28, 2009
    1,281
    Colorado
    Full Name:
    Chuck
    Could be the O2 sensors hunting for the correct air/fuel mixture. I know this happens on other makes as well. The fact it goes away once warmed up seems to fit that scenario. Just my 2 cents.
     
  7. captglen

    captglen Formula 3
    Silver Subscribed

    Nov 25, 2007
    1,790
    West Palm Beach, Fl
    Full Name:
    Glenn L.
    Get the Gold Connector kit made by Dave Helms from Daniel at Ricambi, That will fix your issues and then some. Best money you can spend on your car
     

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