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348 - Tach went dead

Discussion in 'Technical Q&A' started by Mike in ATL, Mar 3, 2006.

  1. Mike in ATL

    Mike in ATL Karting

    Nov 2, 2003
    127
    Full Name:
    Mike
    Picked up car from dealer for ongoing A/C issue/ I took a hard right into my neighborhood & the motor died. Now I have no Tach- I pulled the instrument panel off & pulled off the connector to the tack & reattached & still dead.

    Any ideas?
     
  2. Dr_ferrari

    Dr_ferrari Formula 3
    Professional Ferrari Technician Consultant

    Nov 2, 2003
    1,064
    Pocono Sportscar
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    Jim McGee
    you say the motor died. did it restart?

    regards, jim
     
  3. Mike in ATL

    Mike in ATL Karting

    Nov 2, 2003
    127
    Full Name:
    Mike
    Yes it fired right back up. I found the quick disconnect on the battery was not tight so I removed it as I dont need a repeat. Thats when I lost the Tach.
     
  4. No Doubt

    No Doubt Five Time F1 World Champ
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    May 21, 2005
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    Mr. Sideways
  5. ernie

    ernie Two Time F1 World Champ
    Owner Lifetime Rossa

    Nov 19, 2001
    21,866
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    The Bad Guy
  6. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,940
    Milton, Wash.
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    Jeff B.
    A bad speedo sensor can knock out the tach? According to the manual, the signal for the tach comes from the 5/8 Motronic ECU. Possibly a problem with the TDC/revs sensor for the 5/8 bank?
     
  7. ShanB

    ShanB Formula Junior

    Jul 9, 2003
    547
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    shanb
    #7 ShanB, Mar 4, 2006
    Last edited by a moderator: Sep 7, 2017
  8. ernie

    ernie Two Time F1 World Champ
    Owner Lifetime Rossa

    Nov 19, 2001
    21,866
    The Brickyard
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    The Bad Guy
    Shan, wassssaaap. Long time not talk to.
     
  9. ShanB

    ShanB Formula Junior

    Jul 9, 2003
    547
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    shanb
    Hey Ernie, how's it going? Between the job and travelling it's been pretty hectic. 14 months left before I can go back home. How have you been?
    Shan
     
  10. Miltonian

    Miltonian F1 Veteran

    Dec 11, 2002
    5,940
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    Jeff B.
    Picky correction: according to the manual, the 5/8 sensor is at 9:00 o'clock in your picture, and the 1/4 sensor is at 6:00 o'clock, not the other way around.
     
  11. ernie

    ernie Two Time F1 World Champ
    Owner Lifetime Rossa

    Nov 19, 2001
    21,866
    The Brickyard
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    The Bad Guy
    Good thanks.
     
  12. ProCoach

    ProCoach F1 Veteran
    Owner

    Sep 15, 2004
    5,439
    VIR Raceway
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    Peter
    As these things (crank sensors) get older, we've had the plastic housings for the multi-pin connectors crumble and the connection works apart...

    Particularly on cars that see track days...

    -Peter
     
  13. ShanB

    ShanB Formula Junior

    Jul 9, 2003
    547
    Tejas/Europe/Desert
    Full Name:
    shanb
    Jeff - thanks for catching that.
    Shan
     
  14. Mike in ATL

    Mike in ATL Karting

    Nov 2, 2003
    127
    Full Name:
    Mike
    Dealer did scientific "Tap" on the back of the Tach & presto..Back in action
     

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