Tach Problem 328? Maybe... | FerrariChat
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Tach Problem 328? Maybe...

Discussion in '308/328' started by show time, Sep 12, 2006.

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  1. show time

    show time Formula Junior

    Jan 5, 2006
    670
    Scottsdale AZ
    Full Name:
    Chris
    #1 show time, Sep 12, 2006
    Did I read once where the tach on a 328 (in my case '86) can read inaccurate? It seems what I’m hearing from the engine and what I’m looking at on the gauge are two different things…I searched the archives, perhaps I put in the wrong criteria on the search.

    Can someone point me in the right direction?

    Thanks,

    Chris
     
  2. Bandit

    Bandit Formula Junior

    Dec 21, 2003
    493
    Central MS
    Full Name:
    Mike B.
    #2 Bandit, Sep 12, 2006
  3. show time

    show time Formula Junior

    Jan 5, 2006
    670
    Scottsdale AZ
    Full Name:
    Chris
    #3 show time, Sep 12, 2006
    Thank you much :)
     
  4. wernerg

    wernerg Karting

    Jun 29, 2006
    50
    Danville CA
    Full Name:
    Werner Goertz
    #4 wernerg, Sep 13, 2006
    I am seeing exactly the same problem with my '86 328 - intermittent, though.

    Yes Palo Alto seem to know what they're doing, and I have found them to be very responsive and courteous.

    My tach shows "idle" at 600rpm, and seldom shows more than 2,500 rpm, and my ears tell me a different story.

    Let us know what you find out...
     
  5. AJS328

    AJS328 F1 Veteran
    Owner

    Apr 23, 2003
    7,520
    New Jersey
    Full Name:
    Augustine Staino
    #5 AJS328, Sep 26, 2006
    Just sent my tach to Palo Alto Speedometer today. I'll let you guys know how I make out, although from what everyone has said about them so far I'm sure the problem will be fixed promptly. :)
     
  6. Muggins

    Muggins Rookie

    May 2, 2006
    18
    NZ
    #6 Muggins, Sep 26, 2006
    Skindiver (he's in South Africa) pulled his tacho apart and worked out what was wrong, fixed it and reported it here.

    The calibration potentiometer gets gunked up with carbon or dust and it doesn't take very much to alter the reading in the tacho. Pull the tacho out, dismantle it and clean it out with spray contact cleaner. Re-assemble and you're good to go.

    ..... or you could send it to Palo Alto Speedometer Services.

    Muggins
     

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