Ideal Idle RPM | FerrariChat

Ideal Idle RPM

Discussion in '308/328' started by Willis, Mar 30, 2008.

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  1. Willis

    Willis Rookie

    Joined:
    Nov 21, 2007
    Messages:
    30
    Location:
    Walnut Creek, CA
    Full Name:
    Bill
    My 89 328 used to idle at 900 RPM before a recent light service. Now it idles at 1350 cold and 1100 hot. It seems a little high?
     
    Willis, Mar 30, 2008
    #1
  2. Jedi

    Jedi Moderator Moderator Lifetime Rossa Owner

    Joined:
    Mar 18, 2008
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    32,274
    Location:
    Seattle Area
    Full Name:
    Dave
    I'm certainly no expert - but my '86 328 idles at 900 after 10 minutes warming
    in the garage. Major service last August. She starts out at 1200 or so, then
    kicks down to 1000 but a little 'chuggy' - then after 10 minutes settles in at 900
    and is responsive as can be. Hopefully I'M not the one with the oddball...

    Dave
     
    Jedi, Mar 30, 2008
    #2
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ Lifetime Rossa

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    Steve Magnusson
    Nothing too horrible with those numbers -- the warm idle spec is 1000 +/- 100 RPM so you went from the low side to the high side (but your tach is essentially just an analog voltmeter so its own accuracy may not be so wonderful, and unless you've confirmed it using a digital method -- either from the ignition spark events or the RPM flywheel sensor output -- a 100 RPM difference could be the tach itself rather than a real RPM error).
     
    Steve Magnusson, Mar 30, 2008
    #3

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