Rough cold idle - 328 | FerrariChat
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Rough cold idle - 328

Discussion in '308/328' started by JR328, Oct 1, 2008.

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  1. JR328

    JR328 Rookie

    Sep 8, 2008
    23
    Chicago area
    Full Name:
    John
    #1 JR328, Oct 1, 2008
    Two weeks ago my '89 328 started having a rough cold idle (500 rpm instead of 1000 rpm). The car runs fine when I keep the rpms up and driving down the road. The rough idle goes away when the engine come up to operating temperature (~190 deg.F). Does anyone have any ideas as to where I can look to correct this problem (still learning about this car)? Thank you.
     
  2. santacruzn

    santacruzn Rookie

    Nov 10, 2003
    44
    Santa Cruz, CA
    Full Name:
    Bill Grace
    #2 santacruzn, Oct 1, 2008
    I had a similar problem with my '87 328 and eventually discovered that the cold start fuse was blown. I replaced it and the problem was fixed. I hope that yours can be as simple as that.

    Bill
     
  3. JR328

    JR328 Rookie

    Sep 8, 2008
    23
    Chicago area
    Full Name:
    John
    #3 JR328, Oct 1, 2008
    I checked my fuse, it's fine. Additional information (spent time to look at the issue) - warm up idle is very rich, also there is little to no throttle response. Thank you.
     
  4. spirot

    spirot F1 World Champ

    Dec 12, 2005
    15,188
    Atlanta
    Full Name:
    Tom Spiro
    #4 spirot, Oct 1, 2008
    Sounds like you may have a relay in the left side trunk might be loose. I would check that, and there is a fuse that goes in there as well. Its under the floor in the trunk.

    If its not that, I would look at an air leak, in the aux air valve... under the coolant catch tank....

    other than that you probbably need to take it in to a mechanic... but It seems to me its most likely electrical.
     

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