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Speedo at 140 MPH - car not moving.

Discussion in 'Technical Q&A' started by yelcab, Dec 17, 2003.

  1. yelcab

    yelcab F1 Veteran
    Consultant

    Nov 29, 2001
    9,151
    San Carlos, CA
    Full Name:
    Mitchell Le
    So my GT4 decides to punish me for spending way too much time on the 911 this week. Yesterday I took the Ferrari to work and on the way home the speedo crapped out. It is now showing 140 MPH while the car is sitting in the garage. It will still move if the car moves but my math is bad and I can't mentally subtract 140 from the indicated speed all the time - not to mention the speedo only goes to 160 or so.

    Before I tear into it, what are some hints?

    I hate tearing into this dash, it is not the most elegant designs.
     
  2. fanatic1

    fanatic1 Guest

    Nov 1, 2003
    553
    columbus
    Full Name:
    philip
    Just drive 140 everywhere you go............problem solved!

    Sorry, I couldn't resist! Good luck!
     
  3. BigTex

    BigTex Seven Time F1 World Champ
    Rossa Subscribed Owner

    Dec 6, 2002
    70,748
    Houston, Texas
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    Bubba
    Palo Alto Speedo. If you hurry you will be in line ahead of mine!
     
  4. f355spider

    f355spider F1 World Champ
    Rossa Subscribed Owner

    May 29, 2001
    16,659
    USA
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    Hugh G. Rection
    You are saying it reads 140mph with the car turned off, ignition off? If so, then likely the speedo, but just to be sure, I would unplug the sender off the transaxle just to be sure...and see if it drops down when unplugged.
     
  5. yelcab

    yelcab F1 Veteran
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    Nov 29, 2001
    9,151
    San Carlos, CA
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    Mitchell Le
    The last time I pulled the speedo, opened it up, I noticed that the needle just pulled write off and can be positioned any where. Maybe I'll do that again this time. Palo Alto Speedo is great and all, but ... i am a DIY and they tend to think I am made of money.
     
  6. Dave

    Dave F1 Rookie

    Apr 15, 2001
    2,722
    Little Rock
    Full Name:
    David Jones
    Damn-it man, can't you see your caught in a space time rift...
    You need to pull the barillium chips and re-seat the flash module...

    So I guess that it stays at that speed even with the power disconnected. Does it appear to be more an internal mechanical problem?
     
  7. Birdman

    Birdman F1 Veteran

    Jun 20, 2003
    6,683
    North shore, MA
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    THE Birdman
    Mine did the EXACT same thing, and I pulled it out to send it to Palo Alto speedo last week, thinking that it was hopelessly busted. When I pulled the speedo out of the dash (turning it upside down in the process) the needle just plain fell off. I opened the case, pushed the needle back on and with a reassuring "snap" it popped right onto the spindle and works fine now. Only thing is that I goofed and set it to 0 MPH not 10 MPH. Of course, everyone knows that Ferrari speedos read 10 MPH when not moving, so now I have a built in 10 MPH error (it says 50 when I'm going 60.) I would love to know why they DO that. Just another weird Ferrari thing I guess. ANyway, I'm not taking the instrument panel apart AGAIN just to fix that. The heck with it!

    Birdman
     
  8. Korr

    Korr F1 World Champ
    Silver Subscribed

    Dec 7, 2003
    14,549
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    C9H8O4
    Ferrari autos always look fast standing still.

    This is just proof :)
     
  9. PSk

    PSk F1 World Champ

    Nov 20, 2002
    17,673
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    Pete
    Let the jack down :)

    Pete
     
  10. yelcab

    yelcab F1 Veteran
    Consultant

    Nov 29, 2001
    9,151
    San Carlos, CA
    Full Name:
    Mitchell Le
    Huh?
     
  11. yelcab

    yelcab F1 Veteran
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    Nov 29, 2001
    9,151
    San Carlos, CA
    Full Name:
    Mitchell Le
    Funny, mine was 10 MPH off (just like yours) before it went the other way and now 140 MPH off.

    Shoot, looks like I have to tear into that dash again. What a pain in the butt. The worst design for a dash. Why can't they have it like Porsche 911, the guages just pull out from the front.
     
  12. donaldh2o

    donaldh2o Karting

    Nov 10, 2003
    143
    Irvine CA
    Full Name:
    Don
    While in the dash, don't forget to replace all the light bulbs if they haven't already been changed. Also, if you remove the steering wheel, it's a good time to replace the six little hex screws which attaches it.

    I just did all the above on my '76 308 while waiting for the speedo to be repaired.
     
  13. yelcab

    yelcab F1 Veteran
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    Nov 29, 2001
    9,151
    San Carlos, CA
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    Mitchell Le
    $10 a piece for the screws?
     
  14. PSk

    PSk F1 World Champ

    Nov 20, 2002
    17,673
    Tauranga, NZ
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    Pete
    Yelcab, sorry just joking, i.e. you have left the car up on the jack and thus the rear wheels are not touching the ground ... :) :)

    Pete
     
  15. Birdman

    Birdman F1 Veteran

    Jun 20, 2003
    6,683
    North shore, MA
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    THE Birdman
    And remember if you put it in reverse on the jack, the mileage doesn't go down (proved in Ferris Bueler's Day Off!)
     
  16. gumball3000

    gumball3000 Formula Junior

    Dec 17, 2003
    287
    East Yorkshire
    Full Name:
    Ed Neilson
    Nope...It just flies out of the window and into oblivion!

    Should have hired the Limo...(The big stretch Job with a TV and a bar....)

    Not that I am a fan of the film.........
    Ed
     
  17. bobafett

    bobafett F1 Veteran

    Sep 28, 2002
    9,193
    Don't tell me you're NRVOUS, are you? :D

    "What did I do?" "You killed the car."

    --Dan

     

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