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911 speedometer not working first few miles

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Old 10-24-2007, 01:18 PM
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Leon-87S4
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Default 911 speedometer not working first few miles

I need some help. I have an 87' Carrera and the speedometer does not work for the first 5 - 10 miles every day. Everything is dead, and then suddenly for no reason it comes alive. I am sure its related to power supply but it doesnt seem to be a bump or jarring that makes it come on. I can thump it all I like with no luck, it will come on when it wants to.
Has anyone had similar issues and have any ideas where to look for bad connections etc?
Old 10-24-2007, 01:22 PM
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84_Carrera
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My speedo died on the way home from buying back in '04. It would come & go, even with the previous owner.

I bought the new speedo sensor as that was the likely cause.

After driving the car on a regular basis, the speedo has worked pretty flawlessly. I would imagine this is a case of oxidation / contact crud at the sender end on the trans. I will keep the sender on the shelf for when she really does need it, but that's what happened on my end.

Good luck!
Old 10-24-2007, 01:43 PM
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LaughaC
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Same with mine... but the more I drive the better it works.
Old 10-24-2007, 06:35 PM
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Leon-87S4
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Somehow I dont think its the sensor, because everythng stops, even the odometer which means the motor is not turning for that. Im sure its power just dont know where it could be loose or coroded, also strange that it takes a few miles and then starts to work
Old 10-24-2007, 06:53 PM
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Amber Gramps
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It's time for a multi-meter and a Bentley book. Reproduce the problem and work your way from the spedo and tack back to the power source. It's that simple.
Old 10-24-2007, 07:52 PM
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Peter Zimmermann
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Call the guys at No. Hollywood Speedo - (818) 761-5136. I seem to remember that symptom, and after running a few tests it turned out to be the Speedo.



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