1980 GTSi Tach cuts out | FerrariChat
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1980 GTSi Tach cuts out

Discussion in '308/328' started by Muriel, Aug 11, 2012.

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  1. Muriel

    Muriel Rookie

    Jul 2, 2012
    14
    #1 Muriel, Aug 11, 2012
    Car runs fine most of the time, but has reoccurring problem of no RPM reading and very rich fuel burn at same time. Have yet to figure out a pattern. Has done this during driving and also after sitting for awhile. Cleaning plugs and pulse sensors will usually temporarily solve the problem, but I never say I'll be right back when I'm out for a drive. Any good ideas would be much appreciated. Thanks
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    26,776
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #2 Steve Magnusson, Aug 11, 2012
    Last edited: Aug 11, 2012
    (Assuming that your 1980 308GTSi still has the stock ignition system, and that you mean the tach stops working, but the engine continues to run on only one bank) One fairly painless experiment you can try is swapping the DigiPlex ECUs:

    If the tach then works OK, but you still lose power and only run on one bank = bad sign for one of the DigiPlex ECUs;

    If the symptom remains unchanged (i.e., tach stops working, but the engine continues to run on one bank) = bad sign for one of the TDC flywheel sensors.

    (If I have mis-described your symptom, please clarify.)
     
  3. Owens84QV

    Owens84QV F1 Rookie

    Oct 2, 2001
    4,486
    Somewhere in NC
    Full Name:
    Greg
    #3 Owens84QV, Aug 11, 2012
    Neither of those difficult to fix, but the TDC sensor would be a boatload less expensive!
     
  4. Muriel

    Muriel Rookie

    Jul 2, 2012
    14
    #4 Muriel, Aug 12, 2012
    Thanks for the help.Anxious to try it out. Will get back with results soon. Cheers.
     

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