456 - Tach not working / Sluggish Throttle Response | Page 2 | FerrariChat

456 - Tach not working / Sluggish Throttle Response

Discussion in '456/550/575' started by wiscobadger, May 26, 2020.

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  1. Qavion

    Qavion F1 World Champ
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    Ian Riddell
    #26 Qavion, Jun 10, 2020
    Last edited: Jun 10, 2020
    ... and, of course, the tacho itself. I'm wondering if a short in the tacho could pull down the tacho signal coming from one ECU and the signal going from that ECU to the other ECU (on the inter-ECU wiring).

    Are you getting an ABS light? The ABS system uses engine rpm signals from the (right hand?) engine ECU.
     
  2. wiscobadger

    wiscobadger Karting
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    Cory Eastman
    #27 wiscobadger, Jul 9, 2020
    Wanted to provide an update here.

    Following advice given by Gian Paolo at Affordable Supercar Parts to always check the ECU connections on a 456, I pulled both connectors, cleaned the contacts, plugged them back in and the tach was back. Have gone on several drives since and have not had any tach issues again.
     
  3. tazandjan

    tazandjan Three Time F1 World Champ
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    #28 tazandjan, Jul 9, 2020
    I love a happy ending.
     
  4. Qavion

    Qavion F1 World Champ
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    #29 Qavion, Jul 9, 2020
    Darn... I was hoping we could find out which ECU was generating the signal for the tacho.

    Anyway, good to hear your problem seems to have gone. It seems that the ECUs are more likely to cause a tacho problem than the sensors on these cars.
     
  5. niftyfivefifty

    niftyfivefifty Formula Junior
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    #30 niftyfivefifty, Jul 10, 2020
    That is wonderful, love it!
     
  6. Mirek

    Mirek Formula 3
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    #31 Mirek, Jul 10, 2020
    Congrats man it must feel good !
     
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