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July 8th, 2006, 05:47 PM
| #1 |
| Joined: Jul 8th, 2006 Last Online: November 19th, 2008 Posts: 4
Rep Power: 0  |  Wierd speedometer thing in my car 1997 Lincoln Town Car Cartier When I start, the speedo gives random numbers (digital dash), usually up in the 120 mph range Once I start rolling, it behaves normally and doesn't act up again until the next time I start it. I'm getting 13.3-13.9 volts at the cigarette lighter with the car running, no significant drop under load. Hayne's specs 14-15 volts, so I had my charging system checked but the shop said it's a-ok. Any other things I should look into, or should I just replace the alternator? (150 dollar part, I can do it myself in an afternoon) |
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July 8th, 2006, 06:39 PM
| #2 |
 Joined: Dec 18th, 2005 Last Online: November 29th, 2008 Location: New York, NY Posts: 485
Rep Power: 15   | maybe that's just a little calibration thing that it does at each start up. i used to own a pontiac grand prix which whips the speedo and tach needles to the max position each time i start it up.
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July 8th, 2006, 06:44 PM
| #3 |
| Cigar Smoking Man  Joined: Dec 11th, 2005 Last Online: 02:27 AM Location: A-Town, Illinois. Age: 33 Posts: 4,998
Car: MY07 G11 WRX-TR WRB. Rep Power: 86  | I am thinking that it is also calibrating. Have a friend drive in a seperate car. Get on the interstate and have the person maintain a speed of 55 mph. Then have them maintain a speed of 65 mph. Get off the interstate and have them maintain a speed of 45, 35, and 25 mph. If you are within 2 mph of any of those speeds, youre fine. Changing out an alternator will not change how the speedometer reads. Fuck Haynes, if it is maintaining a charge over 12.7 volts, youre fine.
__________________ It is nice to have friends like you on this forum.  ...A fox among the chickens... Emancipate yourselves from mental slavery None but ourselves can free our minds… |
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July 8th, 2006, 08:10 PM
| #4 |
| Joined: Jul 8th, 2006 Last Online: November 19th, 2008 Posts: 4
Rep Power: 0 | Thanks for the replies. It isn't normal - just started a few nights ago and it actually adds miles to the odometer. I'll just be careful not to start until I'm ready to move. |
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July 8th, 2006, 11:32 PM
| #5 |
 Joined: Mar 31st, 2005 Last Online: November 28th, 2008 Location: Flanders, Belgium Age: 25 Posts: 3,987
Car: RIP Opel Astra -> 2006 Toyota Corolla Wagon Rep Power: 40  | go to your dealer
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